Commit | Line | Data |
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c906108c | 1 | /* Select target systems and architectures at runtime for GDB. |
7998dfc3 | 2 | |
42a4f53d | 3 | Copyright (C) 1990-2019 Free Software Foundation, Inc. |
7998dfc3 | 4 | |
c906108c SS |
5 | Contributed by Cygnus Support. |
6 | ||
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
c906108c | 23 | #include "target.h" |
68c765e2 | 24 | #include "target-dcache.h" |
c906108c SS |
25 | #include "gdbcmd.h" |
26 | #include "symtab.h" | |
27 | #include "inferior.h" | |
45741a9c | 28 | #include "infrun.h" |
c906108c SS |
29 | #include "bfd.h" |
30 | #include "symfile.h" | |
31 | #include "objfiles.h" | |
4930751a | 32 | #include "dcache.h" |
c906108c | 33 | #include <signal.h> |
4e052eda | 34 | #include "regcache.h" |
b6591e8b | 35 | #include "gdbcore.h" |
424163ea | 36 | #include "target-descriptions.h" |
e1ac3328 | 37 | #include "gdbthread.h" |
b9db4ced | 38 | #include "solib.h" |
07b82ea5 | 39 | #include "exec.h" |
edb3359d | 40 | #include "inline-frame.h" |
2f4d8875 | 41 | #include "tracepoint.h" |
7313baad | 42 | #include "gdb/fileio.h" |
0747795c | 43 | #include "common/agent.h" |
8de71aab | 44 | #include "auxv.h" |
a7068b60 | 45 | #include "target-debug.h" |
41fd2b0f PA |
46 | #include "top.h" |
47 | #include "event-top.h" | |
325fac50 | 48 | #include <algorithm> |
0747795c | 49 | #include "common/byte-vector.h" |
e671cd59 | 50 | #include "terminal.h" |
d9f719f1 | 51 | #include <unordered_map> |
c906108c | 52 | |
f0f9ff95 TT |
53 | static void generic_tls_error (void) ATTRIBUTE_NORETURN; |
54 | ||
0a4f40a2 | 55 | static void default_terminal_info (struct target_ops *, const char *, int); |
c906108c | 56 | |
5009afc5 AS |
57 | static int default_watchpoint_addr_within_range (struct target_ops *, |
58 | CORE_ADDR, CORE_ADDR, int); | |
59 | ||
31568a15 TT |
60 | static int default_region_ok_for_hw_watchpoint (struct target_ops *, |
61 | CORE_ADDR, int); | |
e0d24f8d | 62 | |
a30bf1f1 | 63 | static void default_rcmd (struct target_ops *, const char *, struct ui_file *); |
a53f3625 | 64 | |
4229b31d TT |
65 | static ptid_t default_get_ada_task_ptid (struct target_ops *self, |
66 | long lwp, long tid); | |
67 | ||
098dba18 TT |
68 | static int default_follow_fork (struct target_ops *self, int follow_child, |
69 | int detach_fork); | |
70 | ||
8d657035 TT |
71 | static void default_mourn_inferior (struct target_ops *self); |
72 | ||
58a5184e TT |
73 | static int default_search_memory (struct target_ops *ops, |
74 | CORE_ADDR start_addr, | |
75 | ULONGEST search_space_len, | |
76 | const gdb_byte *pattern, | |
77 | ULONGEST pattern_len, | |
78 | CORE_ADDR *found_addrp); | |
79 | ||
936d2992 PA |
80 | static int default_verify_memory (struct target_ops *self, |
81 | const gdb_byte *data, | |
82 | CORE_ADDR memaddr, ULONGEST size); | |
83 | ||
c25c4a8b | 84 | static void tcomplain (void) ATTRIBUTE_NORETURN; |
c906108c | 85 | |
a121b7c1 | 86 | static struct target_ops *find_default_run_target (const char *); |
c906108c | 87 | |
0b5a2719 TT |
88 | static int dummy_find_memory_regions (struct target_ops *self, |
89 | find_memory_region_ftype ignore1, | |
90 | void *ignore2); | |
91 | ||
16f796b1 TT |
92 | static char *dummy_make_corefile_notes (struct target_ops *self, |
93 | bfd *ignore1, int *ignore2); | |
94 | ||
7a114964 | 95 | static const char *default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
770234d3 | 96 | |
fe31bf5b TT |
97 | static enum exec_direction_kind default_execution_direction |
98 | (struct target_ops *self); | |
99 | ||
d9f719f1 PA |
100 | /* Mapping between target_info objects (which have address identity) |
101 | and corresponding open/factory function/callback. Each add_target | |
102 | call adds one entry to this map, and registers a "target | |
103 | TARGET_NAME" command that when invoked calls the factory registered | |
104 | here. The target_info object is associated with the command via | |
105 | the command's context. */ | |
106 | static std::unordered_map<const target_info *, target_open_ftype *> | |
107 | target_factories; | |
c906108c SS |
108 | |
109 | /* The initial current target, so that there is always a semi-valid | |
110 | current target. */ | |
111 | ||
f6ac5f3d PA |
112 | static struct target_ops *the_dummy_target; |
113 | static struct target_ops *the_debug_target; | |
c906108c | 114 | |
a1740ee1 PA |
115 | /* The target stack. */ |
116 | ||
117 | static target_stack g_target_stack; | |
118 | ||
c906108c | 119 | /* Top of target stack. */ |
c906108c SS |
120 | /* The target structure we are currently using to talk to a process |
121 | or file or whatever "inferior" we have. */ | |
122 | ||
8b88a78e PA |
123 | target_ops * |
124 | current_top_target () | |
125 | { | |
a1740ee1 | 126 | return g_target_stack.top (); |
8b88a78e | 127 | } |
c906108c SS |
128 | |
129 | /* Command list for target. */ | |
130 | ||
131 | static struct cmd_list_element *targetlist = NULL; | |
132 | ||
cf7a04e8 DJ |
133 | /* Nonzero if we should trust readonly sections from the |
134 | executable when reading memory. */ | |
135 | ||
136 | static int trust_readonly = 0; | |
137 | ||
8defab1a DJ |
138 | /* Nonzero if we should show true memory content including |
139 | memory breakpoint inserted by gdb. */ | |
140 | ||
141 | static int show_memory_breakpoints = 0; | |
142 | ||
d914c394 SS |
143 | /* These globals control whether GDB attempts to perform these |
144 | operations; they are useful for targets that need to prevent | |
145 | inadvertant disruption, such as in non-stop mode. */ | |
146 | ||
147 | int may_write_registers = 1; | |
148 | ||
149 | int may_write_memory = 1; | |
150 | ||
151 | int may_insert_breakpoints = 1; | |
152 | ||
153 | int may_insert_tracepoints = 1; | |
154 | ||
155 | int may_insert_fast_tracepoints = 1; | |
156 | ||
157 | int may_stop = 1; | |
158 | ||
c906108c SS |
159 | /* Non-zero if we want to see trace of target level stuff. */ |
160 | ||
ccce17b0 | 161 | static unsigned int targetdebug = 0; |
3cecbbbe TT |
162 | |
163 | static void | |
eb4c3f4a | 164 | set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c) |
3cecbbbe | 165 | { |
f6ac5f3d PA |
166 | if (targetdebug) |
167 | push_target (the_debug_target); | |
168 | else | |
169 | unpush_target (the_debug_target); | |
3cecbbbe TT |
170 | } |
171 | ||
920d2a44 AC |
172 | static void |
173 | show_targetdebug (struct ui_file *file, int from_tty, | |
174 | struct cmd_list_element *c, const char *value) | |
175 | { | |
176 | fprintf_filtered (file, _("Target debugging is %s.\n"), value); | |
177 | } | |
c906108c | 178 | |
c906108c SS |
179 | /* The user just typed 'target' without the name of a target. */ |
180 | ||
c906108c | 181 | static void |
981a3fb3 | 182 | target_command (const char *arg, int from_tty) |
c906108c SS |
183 | { |
184 | fputs_filtered ("Argument required (target name). Try `help target'\n", | |
185 | gdb_stdout); | |
186 | } | |
187 | ||
c35b1492 PA |
188 | int |
189 | target_has_all_memory_1 (void) | |
190 | { | |
b6a8c27b | 191 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 192 | if (t->has_all_memory ()) |
c35b1492 PA |
193 | return 1; |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | int | |
199 | target_has_memory_1 (void) | |
200 | { | |
b6a8c27b | 201 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 202 | if (t->has_memory ()) |
c35b1492 PA |
203 | return 1; |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | int | |
209 | target_has_stack_1 (void) | |
210 | { | |
b6a8c27b | 211 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 212 | if (t->has_stack ()) |
c35b1492 PA |
213 | return 1; |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
218 | int | |
219 | target_has_registers_1 (void) | |
220 | { | |
b6a8c27b | 221 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 222 | if (t->has_registers ()) |
c35b1492 PA |
223 | return 1; |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
228 | int | |
aeaec162 | 229 | target_has_execution_1 (ptid_t the_ptid) |
c35b1492 | 230 | { |
b6a8c27b | 231 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d | 232 | if (t->has_execution (the_ptid)) |
c35b1492 PA |
233 | return 1; |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
aeaec162 TT |
238 | int |
239 | target_has_execution_current (void) | |
240 | { | |
241 | return target_has_execution_1 (inferior_ptid); | |
242 | } | |
243 | ||
8981c758 TT |
244 | /* This is used to implement the various target commands. */ |
245 | ||
246 | static void | |
eb4c3f4a | 247 | open_target (const char *args, int from_tty, struct cmd_list_element *command) |
8981c758 | 248 | { |
d9f719f1 PA |
249 | auto *ti = static_cast<target_info *> (get_cmd_context (command)); |
250 | target_open_ftype *func = target_factories[ti]; | |
8981c758 TT |
251 | |
252 | if (targetdebug) | |
d9f719f1 PA |
253 | fprintf_unfiltered (gdb_stdlog, "-> %s->open (...)\n", |
254 | ti->shortname); | |
8981c758 | 255 | |
d9f719f1 | 256 | func (args, from_tty); |
8981c758 TT |
257 | |
258 | if (targetdebug) | |
d9f719f1 PA |
259 | fprintf_unfiltered (gdb_stdlog, "<- %s->open (%s, %d)\n", |
260 | ti->shortname, args, from_tty); | |
8981c758 TT |
261 | } |
262 | ||
d9f719f1 | 263 | /* See target.h. */ |
c22a2b88 TT |
264 | |
265 | void | |
d9f719f1 PA |
266 | add_target (const target_info &t, target_open_ftype *func, |
267 | completer_ftype *completer) | |
c22a2b88 TT |
268 | { |
269 | struct cmd_list_element *c; | |
270 | ||
d9f719f1 PA |
271 | auto &func_slot = target_factories[&t]; |
272 | if (func_slot != nullptr) | |
273 | internal_error (__FILE__, __LINE__, | |
274 | _("target already added (\"%s\")."), t.shortname); | |
275 | func_slot = func; | |
c906108c SS |
276 | |
277 | if (targetlist == NULL) | |
1bedd215 AC |
278 | add_prefix_cmd ("target", class_run, target_command, _("\ |
279 | Connect to a target machine or process.\n\ | |
c906108c SS |
280 | The first argument is the type or protocol of the target machine.\n\ |
281 | Remaining arguments are interpreted by the target protocol. For more\n\ | |
282 | information on the arguments for a particular protocol, type\n\ | |
1bedd215 | 283 | `help target ' followed by the protocol name."), |
c906108c | 284 | &targetlist, "target ", 0, &cmdlist); |
d9f719f1 PA |
285 | c = add_cmd (t.shortname, no_class, t.doc, &targetlist); |
286 | set_cmd_context (c, (void *) &t); | |
8981c758 | 287 | set_cmd_sfunc (c, open_target); |
9852c492 YQ |
288 | if (completer != NULL) |
289 | set_cmd_completer (c, completer); | |
290 | } | |
291 | ||
b48d48eb MM |
292 | /* See target.h. */ |
293 | ||
294 | void | |
d9f719f1 | 295 | add_deprecated_target_alias (const target_info &tinfo, const char *alias) |
b48d48eb MM |
296 | { |
297 | struct cmd_list_element *c; | |
298 | char *alt; | |
299 | ||
300 | /* If we use add_alias_cmd, here, we do not get the deprecated warning, | |
301 | see PR cli/15104. */ | |
d9f719f1 | 302 | c = add_cmd (alias, no_class, tinfo.doc, &targetlist); |
8981c758 | 303 | set_cmd_sfunc (c, open_target); |
d9f719f1 PA |
304 | set_cmd_context (c, (void *) &tinfo); |
305 | alt = xstrprintf ("target %s", tinfo.shortname); | |
b48d48eb MM |
306 | deprecate_cmd (c, alt); |
307 | } | |
308 | ||
c906108c SS |
309 | /* Stub functions */ |
310 | ||
7d85a9c0 JB |
311 | void |
312 | target_kill (void) | |
313 | { | |
8b88a78e | 314 | current_top_target ()->kill (); |
7d85a9c0 JB |
315 | } |
316 | ||
11cf8741 | 317 | void |
9cbe5fff | 318 | target_load (const char *arg, int from_tty) |
11cf8741 | 319 | { |
4e5d721f | 320 | target_dcache_invalidate (); |
8b88a78e | 321 | current_top_target ()->load (arg, from_tty); |
11cf8741 JM |
322 | } |
323 | ||
223ffa71 | 324 | /* Define it. */ |
5842f62a | 325 | |
e671cd59 PA |
326 | target_terminal_state target_terminal::m_terminal_state |
327 | = target_terminal_state::is_ours; | |
5842f62a | 328 | |
223ffa71 | 329 | /* See target/target.h. */ |
5842f62a PA |
330 | |
331 | void | |
223ffa71 | 332 | target_terminal::init (void) |
5842f62a | 333 | { |
8b88a78e | 334 | current_top_target ()->terminal_init (); |
5842f62a | 335 | |
e671cd59 | 336 | m_terminal_state = target_terminal_state::is_ours; |
5842f62a PA |
337 | } |
338 | ||
223ffa71 | 339 | /* See target/target.h. */ |
2f99e8fc | 340 | |
d9d2d8b6 | 341 | void |
223ffa71 | 342 | target_terminal::inferior (void) |
d9d2d8b6 | 343 | { |
41fd2b0f PA |
344 | struct ui *ui = current_ui; |
345 | ||
d9d2d8b6 | 346 | /* A background resume (``run&'') should leave GDB in control of the |
3b12939d PA |
347 | terminal. */ |
348 | if (ui->prompt_state != PROMPT_BLOCKED) | |
d9d2d8b6 PA |
349 | return; |
350 | ||
215d3118 PA |
351 | /* Since we always run the inferior in the main console (unless "set |
352 | inferior-tty" is in effect), when some UI other than the main one | |
223ffa71 TT |
353 | calls target_terminal::inferior, then we leave the main UI's |
354 | terminal settings as is. */ | |
215d3118 PA |
355 | if (ui != main_ui) |
356 | return; | |
357 | ||
d9d2d8b6 PA |
358 | /* If GDB is resuming the inferior in the foreground, install |
359 | inferior's terminal modes. */ | |
e671cd59 PA |
360 | |
361 | struct inferior *inf = current_inferior (); | |
362 | ||
363 | if (inf->terminal_state != target_terminal_state::is_inferior) | |
364 | { | |
8b88a78e | 365 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
366 | inf->terminal_state = target_terminal_state::is_inferior; |
367 | } | |
368 | ||
369 | m_terminal_state = target_terminal_state::is_inferior; | |
370 | ||
371 | /* If the user hit C-c before, pretend that it was hit right | |
372 | here. */ | |
373 | if (check_quit_flag ()) | |
374 | target_pass_ctrlc (); | |
375 | } | |
376 | ||
377 | /* See target/target.h. */ | |
378 | ||
379 | void | |
380 | target_terminal::restore_inferior (void) | |
381 | { | |
382 | struct ui *ui = current_ui; | |
383 | ||
384 | /* See target_terminal::inferior(). */ | |
385 | if (ui->prompt_state != PROMPT_BLOCKED || ui != main_ui) | |
386 | return; | |
387 | ||
388 | /* Restore the terminal settings of inferiors that were in the | |
389 | foreground but are now ours_for_output due to a temporary | |
390 | target_target::ours_for_output() call. */ | |
391 | ||
392 | { | |
393 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 | 394 | |
84b68c77 | 395 | for (::inferior *inf : all_inferiors ()) |
e671cd59 PA |
396 | { |
397 | if (inf->terminal_state == target_terminal_state::is_ours_for_output) | |
398 | { | |
399 | set_current_inferior (inf); | |
8b88a78e | 400 | current_top_target ()->terminal_inferior (); |
e671cd59 PA |
401 | inf->terminal_state = target_terminal_state::is_inferior; |
402 | } | |
403 | } | |
404 | } | |
405 | ||
406 | m_terminal_state = target_terminal_state::is_inferior; | |
93692b58 PA |
407 | |
408 | /* If the user hit C-c before, pretend that it was hit right | |
409 | here. */ | |
410 | if (check_quit_flag ()) | |
411 | target_pass_ctrlc (); | |
5842f62a PA |
412 | } |
413 | ||
e671cd59 PA |
414 | /* Switch terminal state to DESIRED_STATE, either is_ours, or |
415 | is_ours_for_output. */ | |
416 | ||
417 | static void | |
418 | target_terminal_is_ours_kind (target_terminal_state desired_state) | |
419 | { | |
420 | scoped_restore_current_inferior restore_inferior; | |
e671cd59 PA |
421 | |
422 | /* Must do this in two passes. First, have all inferiors save the | |
423 | current terminal settings. Then, after all inferiors have add a | |
424 | chance to safely save the terminal settings, restore GDB's | |
425 | terminal settings. */ | |
426 | ||
08036331 | 427 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
428 | { |
429 | if (inf->terminal_state == target_terminal_state::is_inferior) | |
430 | { | |
431 | set_current_inferior (inf); | |
8b88a78e | 432 | current_top_target ()->terminal_save_inferior (); |
e671cd59 PA |
433 | } |
434 | } | |
435 | ||
08036331 | 436 | for (inferior *inf : all_inferiors ()) |
e671cd59 PA |
437 | { |
438 | /* Note we don't check is_inferior here like above because we | |
439 | need to handle 'is_ours_for_output -> is_ours' too. Careful | |
440 | to never transition from 'is_ours' to 'is_ours_for_output', | |
441 | though. */ | |
442 | if (inf->terminal_state != target_terminal_state::is_ours | |
443 | && inf->terminal_state != desired_state) | |
444 | { | |
445 | set_current_inferior (inf); | |
446 | if (desired_state == target_terminal_state::is_ours) | |
8b88a78e | 447 | current_top_target ()->terminal_ours (); |
e671cd59 | 448 | else if (desired_state == target_terminal_state::is_ours_for_output) |
8b88a78e | 449 | current_top_target ()->terminal_ours_for_output (); |
e671cd59 PA |
450 | else |
451 | gdb_assert_not_reached ("unhandled desired state"); | |
452 | inf->terminal_state = desired_state; | |
453 | } | |
454 | } | |
455 | } | |
456 | ||
223ffa71 | 457 | /* See target/target.h. */ |
5842f62a PA |
458 | |
459 | void | |
223ffa71 | 460 | target_terminal::ours () |
5842f62a | 461 | { |
41fd2b0f PA |
462 | struct ui *ui = current_ui; |
463 | ||
223ffa71 | 464 | /* See target_terminal::inferior. */ |
215d3118 PA |
465 | if (ui != main_ui) |
466 | return; | |
467 | ||
e671cd59 | 468 | if (m_terminal_state == target_terminal_state::is_ours) |
5842f62a PA |
469 | return; |
470 | ||
e671cd59 PA |
471 | target_terminal_is_ours_kind (target_terminal_state::is_ours); |
472 | m_terminal_state = target_terminal_state::is_ours; | |
5842f62a PA |
473 | } |
474 | ||
223ffa71 | 475 | /* See target/target.h. */ |
5842f62a PA |
476 | |
477 | void | |
223ffa71 | 478 | target_terminal::ours_for_output () |
5842f62a | 479 | { |
215d3118 PA |
480 | struct ui *ui = current_ui; |
481 | ||
223ffa71 | 482 | /* See target_terminal::inferior. */ |
215d3118 PA |
483 | if (ui != main_ui) |
484 | return; | |
485 | ||
e671cd59 | 486 | if (!target_terminal::is_inferior ()) |
5842f62a | 487 | return; |
e671cd59 PA |
488 | |
489 | target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output); | |
490 | target_terminal::m_terminal_state = target_terminal_state::is_ours_for_output; | |
d9d2d8b6 | 491 | } |
136d6dae | 492 | |
223ffa71 TT |
493 | /* See target/target.h. */ |
494 | ||
495 | void | |
496 | target_terminal::info (const char *arg, int from_tty) | |
497 | { | |
8b88a78e | 498 | current_top_target ()->terminal_info (arg, from_tty); |
223ffa71 TT |
499 | } |
500 | ||
b0ed115f TT |
501 | /* See target.h. */ |
502 | ||
20f0d60d | 503 | bool |
b0ed115f TT |
504 | target_supports_terminal_ours (void) |
505 | { | |
20f0d60d TT |
506 | /* This can be called before there is any target, so we must check |
507 | for nullptr here. */ | |
508 | target_ops *top = current_top_target (); | |
509 | ||
510 | if (top == nullptr) | |
511 | return false; | |
512 | return top->supports_terminal_ours (); | |
b0ed115f TT |
513 | } |
514 | ||
c906108c | 515 | static void |
fba45db2 | 516 | tcomplain (void) |
c906108c | 517 | { |
8a3fe4f8 | 518 | error (_("You can't do that when your target is `%s'"), |
8b88a78e | 519 | current_top_target ()->shortname ()); |
c906108c SS |
520 | } |
521 | ||
522 | void | |
fba45db2 | 523 | noprocess (void) |
c906108c | 524 | { |
8a3fe4f8 | 525 | error (_("You can't do that without a process to debug.")); |
c906108c SS |
526 | } |
527 | ||
c906108c | 528 | static void |
0a4f40a2 | 529 | default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
c906108c | 530 | { |
a3f17187 | 531 | printf_unfiltered (_("No saved terminal information.\n")); |
c906108c SS |
532 | } |
533 | ||
0ef643c8 JB |
534 | /* A default implementation for the to_get_ada_task_ptid target method. |
535 | ||
536 | This function builds the PTID by using both LWP and TID as part of | |
537 | the PTID lwp and tid elements. The pid used is the pid of the | |
538 | inferior_ptid. */ | |
539 | ||
2c0b251b | 540 | static ptid_t |
1e6b91a4 | 541 | default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
0ef643c8 | 542 | { |
e99b03dc | 543 | return ptid_t (inferior_ptid.pid (), lwp, tid); |
0ef643c8 JB |
544 | } |
545 | ||
32231432 | 546 | static enum exec_direction_kind |
4c612759 | 547 | default_execution_direction (struct target_ops *self) |
32231432 PA |
548 | { |
549 | if (!target_can_execute_reverse) | |
550 | return EXEC_FORWARD; | |
551 | else if (!target_can_async_p ()) | |
552 | return EXEC_FORWARD; | |
553 | else | |
554 | gdb_assert_not_reached ("\ | |
555 | to_execution_direction must be implemented for reverse async"); | |
556 | } | |
557 | ||
a1740ee1 | 558 | /* See target.h. */ |
c906108c | 559 | |
b26a4dcb | 560 | void |
a1740ee1 | 561 | target_stack::push (target_ops *t) |
c906108c | 562 | { |
a1740ee1 | 563 | /* If there's already a target at this stratum, remove it. */ |
66b4deae PA |
564 | strata stratum = t->stratum (); |
565 | ||
566 | if (m_stack[stratum] != NULL) | |
c906108c | 567 | { |
66b4deae PA |
568 | target_ops *prev = m_stack[stratum]; |
569 | m_stack[stratum] = NULL; | |
a1740ee1 | 570 | target_close (prev); |
c906108c SS |
571 | } |
572 | ||
a1740ee1 | 573 | /* Now add the new one. */ |
66b4deae | 574 | m_stack[stratum] = t; |
5d502164 | 575 | |
66b4deae PA |
576 | if (m_top < stratum) |
577 | m_top = stratum; | |
a1740ee1 PA |
578 | } |
579 | ||
580 | /* See target.h. */ | |
c906108c | 581 | |
a1740ee1 PA |
582 | void |
583 | push_target (struct target_ops *t) | |
584 | { | |
585 | g_target_stack.push (t); | |
c906108c SS |
586 | } |
587 | ||
dea57a62 TT |
588 | /* See target.h */ |
589 | ||
590 | void | |
591 | push_target (target_ops_up &&t) | |
592 | { | |
593 | g_target_stack.push (t.get ()); | |
594 | t.release (); | |
595 | } | |
596 | ||
a1740ee1 | 597 | /* See target.h. */ |
c906108c SS |
598 | |
599 | int | |
fba45db2 | 600 | unpush_target (struct target_ops *t) |
a1740ee1 PA |
601 | { |
602 | return g_target_stack.unpush (t); | |
603 | } | |
604 | ||
605 | /* See target.h. */ | |
606 | ||
607 | bool | |
608 | target_stack::unpush (target_ops *t) | |
c906108c | 609 | { |
1688cb29 TT |
610 | gdb_assert (t != NULL); |
611 | ||
66b4deae PA |
612 | strata stratum = t->stratum (); |
613 | ||
614 | if (stratum == dummy_stratum) | |
c8d104ad | 615 | internal_error (__FILE__, __LINE__, |
9b20d036 | 616 | _("Attempt to unpush the dummy target")); |
c8d104ad | 617 | |
a1740ee1 PA |
618 | /* Look for the specified target. Note that a target can only occur |
619 | once in the target stack. */ | |
c906108c | 620 | |
66b4deae | 621 | if (m_stack[stratum] != t) |
258b763a | 622 | { |
a1740ee1 PA |
623 | /* If T wasn't pushed, quit. Only open targets should be |
624 | closed. */ | |
625 | return false; | |
258b763a | 626 | } |
c906108c | 627 | |
c378eb4e | 628 | /* Unchain the target. */ |
66b4deae | 629 | m_stack[stratum] = NULL; |
a1740ee1 | 630 | |
66b4deae PA |
631 | if (m_top == stratum) |
632 | m_top = t->beneath ()->stratum (); | |
c906108c | 633 | |
305436e0 PA |
634 | /* Finally close the target. Note we do this after unchaining, so |
635 | any target method calls from within the target_close | |
636 | implementation don't end up in T anymore. */ | |
460014f5 | 637 | target_close (t); |
305436e0 | 638 | |
a1740ee1 | 639 | return true; |
c906108c SS |
640 | } |
641 | ||
915ef8b1 PA |
642 | /* Unpush TARGET and assert that it worked. */ |
643 | ||
644 | static void | |
645 | unpush_target_and_assert (struct target_ops *target) | |
646 | { | |
647 | if (!unpush_target (target)) | |
648 | { | |
649 | fprintf_unfiltered (gdb_stderr, | |
650 | "pop_all_targets couldn't find target %s\n", | |
f6ac5f3d | 651 | target->shortname ()); |
915ef8b1 PA |
652 | internal_error (__FILE__, __LINE__, |
653 | _("failed internal consistency check")); | |
654 | } | |
655 | } | |
656 | ||
aa76d38d | 657 | void |
460014f5 | 658 | pop_all_targets_above (enum strata above_stratum) |
aa76d38d | 659 | { |
66b4deae | 660 | while ((int) (current_top_target ()->stratum ()) > (int) above_stratum) |
8b88a78e | 661 | unpush_target_and_assert (current_top_target ()); |
915ef8b1 PA |
662 | } |
663 | ||
664 | /* See target.h. */ | |
665 | ||
666 | void | |
667 | pop_all_targets_at_and_above (enum strata stratum) | |
668 | { | |
66b4deae | 669 | while ((int) (current_top_target ()->stratum ()) >= (int) stratum) |
8b88a78e | 670 | unpush_target_and_assert (current_top_target ()); |
aa76d38d PA |
671 | } |
672 | ||
87ab71f0 | 673 | void |
460014f5 | 674 | pop_all_targets (void) |
87ab71f0 | 675 | { |
460014f5 | 676 | pop_all_targets_above (dummy_stratum); |
87ab71f0 PA |
677 | } |
678 | ||
c0edd9ed JK |
679 | /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */ |
680 | ||
681 | int | |
682 | target_is_pushed (struct target_ops *t) | |
683 | { | |
a1740ee1 | 684 | return g_target_stack.is_pushed (t); |
c0edd9ed JK |
685 | } |
686 | ||
f0f9ff95 TT |
687 | /* Default implementation of to_get_thread_local_address. */ |
688 | ||
689 | static void | |
690 | generic_tls_error (void) | |
691 | { | |
692 | throw_error (TLS_GENERIC_ERROR, | |
693 | _("Cannot find thread-local variables on this target")); | |
694 | } | |
695 | ||
72f5cf0e | 696 | /* Using the objfile specified in OBJFILE, find the address for the |
9e35dae4 DJ |
697 | current thread's thread-local storage with offset OFFSET. */ |
698 | CORE_ADDR | |
699 | target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) | |
700 | { | |
701 | volatile CORE_ADDR addr = 0; | |
8b88a78e | 702 | struct target_ops *target = current_top_target (); |
9e35dae4 | 703 | |
f0f9ff95 | 704 | if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ())) |
9e35dae4 DJ |
705 | { |
706 | ptid_t ptid = inferior_ptid; | |
9e35dae4 | 707 | |
492d29ea | 708 | TRY |
9e35dae4 DJ |
709 | { |
710 | CORE_ADDR lm_addr; | |
711 | ||
712 | /* Fetch the load module address for this objfile. */ | |
f5656ead | 713 | lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (), |
9e35dae4 | 714 | objfile); |
9e35dae4 | 715 | |
f6ac5f3d | 716 | addr = target->get_thread_local_address (ptid, lm_addr, offset); |
9e35dae4 DJ |
717 | } |
718 | /* If an error occurred, print TLS related messages here. Otherwise, | |
719 | throw the error to some higher catcher. */ | |
492d29ea | 720 | CATCH (ex, RETURN_MASK_ALL) |
9e35dae4 DJ |
721 | { |
722 | int objfile_is_library = (objfile->flags & OBJF_SHARED); | |
723 | ||
724 | switch (ex.error) | |
725 | { | |
726 | case TLS_NO_LIBRARY_SUPPORT_ERROR: | |
3e43a32a MS |
727 | error (_("Cannot find thread-local variables " |
728 | "in this thread library.")); | |
9e35dae4 DJ |
729 | break; |
730 | case TLS_LOAD_MODULE_NOT_FOUND_ERROR: | |
731 | if (objfile_is_library) | |
732 | error (_("Cannot find shared library `%s' in dynamic" | |
4262abfb | 733 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
734 | else |
735 | error (_("Cannot find executable file `%s' in dynamic" | |
4262abfb | 736 | " linker's load module list"), objfile_name (objfile)); |
9e35dae4 DJ |
737 | break; |
738 | case TLS_NOT_ALLOCATED_YET_ERROR: | |
739 | if (objfile_is_library) | |
740 | error (_("The inferior has not yet allocated storage for" | |
741 | " thread-local variables in\n" | |
742 | "the shared library `%s'\n" | |
743 | "for %s"), | |
4262abfb | 744 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
745 | else |
746 | error (_("The inferior has not yet allocated storage for" | |
747 | " thread-local variables in\n" | |
748 | "the executable `%s'\n" | |
749 | "for %s"), | |
4262abfb | 750 | objfile_name (objfile), target_pid_to_str (ptid)); |
9e35dae4 DJ |
751 | break; |
752 | case TLS_GENERIC_ERROR: | |
753 | if (objfile_is_library) | |
754 | error (_("Cannot find thread-local storage for %s, " | |
755 | "shared library %s:\n%s"), | |
756 | target_pid_to_str (ptid), | |
4262abfb | 757 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
758 | else |
759 | error (_("Cannot find thread-local storage for %s, " | |
760 | "executable file %s:\n%s"), | |
761 | target_pid_to_str (ptid), | |
4262abfb | 762 | objfile_name (objfile), ex.message); |
9e35dae4 DJ |
763 | break; |
764 | default: | |
765 | throw_exception (ex); | |
766 | break; | |
767 | } | |
768 | } | |
492d29ea | 769 | END_CATCH |
9e35dae4 DJ |
770 | } |
771 | /* It wouldn't be wrong here to try a gdbarch method, too; finding | |
772 | TLS is an ABI-specific thing. But we don't do that yet. */ | |
773 | else | |
774 | error (_("Cannot find thread-local variables on this target")); | |
775 | ||
776 | return addr; | |
777 | } | |
778 | ||
6be7b56e | 779 | const char * |
01cb8804 | 780 | target_xfer_status_to_string (enum target_xfer_status status) |
6be7b56e PA |
781 | { |
782 | #define CASE(X) case X: return #X | |
01cb8804 | 783 | switch (status) |
6be7b56e PA |
784 | { |
785 | CASE(TARGET_XFER_E_IO); | |
bc113b4e | 786 | CASE(TARGET_XFER_UNAVAILABLE); |
6be7b56e PA |
787 | default: |
788 | return "<unknown>"; | |
789 | } | |
790 | #undef CASE | |
791 | }; | |
792 | ||
793 | ||
c906108c SS |
794 | #undef MIN |
795 | #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) | |
796 | ||
797 | /* target_read_string -- read a null terminated string, up to LEN bytes, | |
798 | from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. | |
799 | Set *STRING to a pointer to malloc'd memory containing the data; the caller | |
800 | is responsible for freeing it. Return the number of bytes successfully | |
801 | read. */ | |
802 | ||
803 | int | |
e83e4e24 TT |
804 | target_read_string (CORE_ADDR memaddr, gdb::unique_xmalloc_ptr<char> *string, |
805 | int len, int *errnop) | |
c906108c | 806 | { |
c2e8b827 | 807 | int tlen, offset, i; |
1b0ba102 | 808 | gdb_byte buf[4]; |
c906108c SS |
809 | int errcode = 0; |
810 | char *buffer; | |
811 | int buffer_allocated; | |
812 | char *bufptr; | |
813 | unsigned int nbytes_read = 0; | |
814 | ||
6217bf3e MS |
815 | gdb_assert (string); |
816 | ||
c906108c SS |
817 | /* Small for testing. */ |
818 | buffer_allocated = 4; | |
224c3ddb | 819 | buffer = (char *) xmalloc (buffer_allocated); |
c906108c SS |
820 | bufptr = buffer; |
821 | ||
c906108c SS |
822 | while (len > 0) |
823 | { | |
824 | tlen = MIN (len, 4 - (memaddr & 3)); | |
825 | offset = memaddr & 3; | |
826 | ||
1b0ba102 | 827 | errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
c906108c SS |
828 | if (errcode != 0) |
829 | { | |
830 | /* The transfer request might have crossed the boundary to an | |
c378eb4e | 831 | unallocated region of memory. Retry the transfer, requesting |
c906108c SS |
832 | a single byte. */ |
833 | tlen = 1; | |
834 | offset = 0; | |
b8eb5af0 | 835 | errcode = target_read_memory (memaddr, buf, 1); |
c906108c SS |
836 | if (errcode != 0) |
837 | goto done; | |
838 | } | |
839 | ||
840 | if (bufptr - buffer + tlen > buffer_allocated) | |
841 | { | |
842 | unsigned int bytes; | |
5d502164 | 843 | |
c906108c SS |
844 | bytes = bufptr - buffer; |
845 | buffer_allocated *= 2; | |
224c3ddb | 846 | buffer = (char *) xrealloc (buffer, buffer_allocated); |
c906108c SS |
847 | bufptr = buffer + bytes; |
848 | } | |
849 | ||
850 | for (i = 0; i < tlen; i++) | |
851 | { | |
852 | *bufptr++ = buf[i + offset]; | |
853 | if (buf[i + offset] == '\000') | |
854 | { | |
855 | nbytes_read += i + 1; | |
856 | goto done; | |
857 | } | |
858 | } | |
859 | ||
860 | memaddr += tlen; | |
861 | len -= tlen; | |
862 | nbytes_read += tlen; | |
863 | } | |
c5aa993b | 864 | done: |
e83e4e24 | 865 | string->reset (buffer); |
c906108c SS |
866 | if (errnop != NULL) |
867 | *errnop = errcode; | |
c906108c SS |
868 | return nbytes_read; |
869 | } | |
870 | ||
07b82ea5 PA |
871 | struct target_section_table * |
872 | target_get_section_table (struct target_ops *target) | |
873 | { | |
f6ac5f3d | 874 | return target->get_section_table (); |
07b82ea5 PA |
875 | } |
876 | ||
8db32d44 | 877 | /* Find a section containing ADDR. */ |
07b82ea5 | 878 | |
0542c86d | 879 | struct target_section * |
8db32d44 AC |
880 | target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
881 | { | |
07b82ea5 | 882 | struct target_section_table *table = target_get_section_table (target); |
0542c86d | 883 | struct target_section *secp; |
07b82ea5 PA |
884 | |
885 | if (table == NULL) | |
886 | return NULL; | |
887 | ||
888 | for (secp = table->sections; secp < table->sections_end; secp++) | |
8db32d44 AC |
889 | { |
890 | if (addr >= secp->addr && addr < secp->endaddr) | |
891 | return secp; | |
892 | } | |
893 | return NULL; | |
894 | } | |
895 | ||
0fec99e8 PA |
896 | |
897 | /* Helper for the memory xfer routines. Checks the attributes of the | |
898 | memory region of MEMADDR against the read or write being attempted. | |
899 | If the access is permitted returns true, otherwise returns false. | |
900 | REGION_P is an optional output parameter. If not-NULL, it is | |
901 | filled with a pointer to the memory region of MEMADDR. REG_LEN | |
902 | returns LEN trimmed to the end of the region. This is how much the | |
903 | caller can continue requesting, if the access is permitted. A | |
904 | single xfer request must not straddle memory region boundaries. */ | |
905 | ||
906 | static int | |
907 | memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, | |
908 | ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, | |
909 | struct mem_region **region_p) | |
910 | { | |
911 | struct mem_region *region; | |
912 | ||
913 | region = lookup_mem_region (memaddr); | |
914 | ||
915 | if (region_p != NULL) | |
916 | *region_p = region; | |
917 | ||
918 | switch (region->attrib.mode) | |
919 | { | |
920 | case MEM_RO: | |
921 | if (writebuf != NULL) | |
922 | return 0; | |
923 | break; | |
924 | ||
925 | case MEM_WO: | |
926 | if (readbuf != NULL) | |
927 | return 0; | |
928 | break; | |
929 | ||
930 | case MEM_FLASH: | |
931 | /* We only support writing to flash during "load" for now. */ | |
932 | if (writebuf != NULL) | |
933 | error (_("Writing to flash memory forbidden in this context")); | |
934 | break; | |
935 | ||
936 | case MEM_NONE: | |
937 | return 0; | |
938 | } | |
939 | ||
940 | /* region->hi == 0 means there's no upper bound. */ | |
941 | if (memaddr + len < region->hi || region->hi == 0) | |
942 | *reg_len = len; | |
943 | else | |
944 | *reg_len = region->hi - memaddr; | |
945 | ||
946 | return 1; | |
947 | } | |
948 | ||
9f713294 YQ |
949 | /* Read memory from more than one valid target. A core file, for |
950 | instance, could have some of memory but delegate other bits to | |
951 | the target below it. So, we must manually try all targets. */ | |
952 | ||
cc9f16aa | 953 | enum target_xfer_status |
17fde6d0 | 954 | raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
9b409511 YQ |
955 | const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
956 | ULONGEST *xfered_len) | |
9f713294 | 957 | { |
9b409511 | 958 | enum target_xfer_status res; |
9f713294 YQ |
959 | |
960 | do | |
961 | { | |
f6ac5f3d PA |
962 | res = ops->xfer_partial (TARGET_OBJECT_MEMORY, NULL, |
963 | readbuf, writebuf, memaddr, len, | |
964 | xfered_len); | |
9b409511 | 965 | if (res == TARGET_XFER_OK) |
9f713294 YQ |
966 | break; |
967 | ||
633785ff | 968 | /* Stop if the target reports that the memory is not available. */ |
bc113b4e | 969 | if (res == TARGET_XFER_UNAVAILABLE) |
633785ff MM |
970 | break; |
971 | ||
9f713294 YQ |
972 | /* We want to continue past core files to executables, but not |
973 | past a running target's memory. */ | |
f6ac5f3d | 974 | if (ops->has_all_memory ()) |
9f713294 YQ |
975 | break; |
976 | ||
b6a8c27b | 977 | ops = ops->beneath (); |
9f713294 YQ |
978 | } |
979 | while (ops != NULL); | |
980 | ||
0f26cec1 PA |
981 | /* The cache works at the raw memory level. Make sure the cache |
982 | gets updated with raw contents no matter what kind of memory | |
983 | object was originally being written. Note we do write-through | |
984 | first, so that if it fails, we don't write to the cache contents | |
985 | that never made it to the target. */ | |
986 | if (writebuf != NULL | |
d7e15655 | 987 | && inferior_ptid != null_ptid |
0f26cec1 PA |
988 | && target_dcache_init_p () |
989 | && (stack_cache_enabled_p () || code_cache_enabled_p ())) | |
990 | { | |
991 | DCACHE *dcache = target_dcache_get (); | |
992 | ||
993 | /* Note that writing to an area of memory which wasn't present | |
994 | in the cache doesn't cause it to be loaded in. */ | |
995 | dcache_update (dcache, res, memaddr, writebuf, *xfered_len); | |
996 | } | |
997 | ||
9f713294 YQ |
998 | return res; |
999 | } | |
1000 | ||
7f79c47e DE |
1001 | /* Perform a partial memory transfer. |
1002 | For docs see target.h, to_xfer_partial. */ | |
cf7a04e8 | 1003 | |
9b409511 | 1004 | static enum target_xfer_status |
f0ba3972 | 1005 | memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
17fde6d0 | 1006 | gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
9b409511 | 1007 | ULONGEST len, ULONGEST *xfered_len) |
0779438d | 1008 | { |
9b409511 | 1009 | enum target_xfer_status res; |
0fec99e8 | 1010 | ULONGEST reg_len; |
cf7a04e8 | 1011 | struct mem_region *region; |
4e5d721f | 1012 | struct inferior *inf; |
cf7a04e8 | 1013 | |
07b82ea5 PA |
1014 | /* For accesses to unmapped overlay sections, read directly from |
1015 | files. Must do this first, as MEMADDR may need adjustment. */ | |
1016 | if (readbuf != NULL && overlay_debugging) | |
1017 | { | |
1018 | struct obj_section *section = find_pc_overlay (memaddr); | |
5d502164 | 1019 | |
07b82ea5 PA |
1020 | if (pc_in_unmapped_range (memaddr, section)) |
1021 | { | |
1022 | struct target_section_table *table | |
1023 | = target_get_section_table (ops); | |
1024 | const char *section_name = section->the_bfd_section->name; | |
5d502164 | 1025 | |
07b82ea5 PA |
1026 | memaddr = overlay_mapped_address (memaddr, section); |
1027 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1028 | memaddr, len, xfered_len, |
07b82ea5 PA |
1029 | table->sections, |
1030 | table->sections_end, | |
1031 | section_name); | |
1032 | } | |
1033 | } | |
1034 | ||
1035 | /* Try the executable files, if "trust-readonly-sections" is set. */ | |
cf7a04e8 DJ |
1036 | if (readbuf != NULL && trust_readonly) |
1037 | { | |
0542c86d | 1038 | struct target_section *secp; |
07b82ea5 | 1039 | struct target_section_table *table; |
cf7a04e8 DJ |
1040 | |
1041 | secp = target_section_by_addr (ops, memaddr); | |
1042 | if (secp != NULL | |
2b2848e2 DE |
1043 | && (bfd_get_section_flags (secp->the_bfd_section->owner, |
1044 | secp->the_bfd_section) | |
cf7a04e8 | 1045 | & SEC_READONLY)) |
07b82ea5 PA |
1046 | { |
1047 | table = target_get_section_table (ops); | |
1048 | return section_table_xfer_memory_partial (readbuf, writebuf, | |
9b409511 | 1049 | memaddr, len, xfered_len, |
07b82ea5 PA |
1050 | table->sections, |
1051 | table->sections_end, | |
1052 | NULL); | |
1053 | } | |
98646950 UW |
1054 | } |
1055 | ||
cf7a04e8 | 1056 | /* Try GDB's internal data cache. */ |
cf7a04e8 | 1057 | |
0fec99e8 PA |
1058 | if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
1059 | ®ion)) | |
1060 | return TARGET_XFER_E_IO; | |
cf7a04e8 | 1061 | |
d7e15655 | 1062 | if (inferior_ptid != null_ptid) |
00431a78 | 1063 | inf = current_inferior (); |
6c95b8df PA |
1064 | else |
1065 | inf = NULL; | |
4e5d721f DE |
1066 | |
1067 | if (inf != NULL | |
0f26cec1 | 1068 | && readbuf != NULL |
2f4d8875 PA |
1069 | /* The dcache reads whole cache lines; that doesn't play well |
1070 | with reading from a trace buffer, because reading outside of | |
1071 | the collected memory range fails. */ | |
1072 | && get_traceframe_number () == -1 | |
4e5d721f | 1073 | && (region->attrib.cache |
29453a14 YQ |
1074 | || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
1075 | || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) | |
cf7a04e8 | 1076 | { |
2a2f9fe4 YQ |
1077 | DCACHE *dcache = target_dcache_get_or_init (); |
1078 | ||
0f26cec1 PA |
1079 | return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
1080 | reg_len, xfered_len); | |
cf7a04e8 DJ |
1081 | } |
1082 | ||
1083 | /* If none of those methods found the memory we wanted, fall back | |
1084 | to a target partial transfer. Normally a single call to | |
1085 | to_xfer_partial is enough; if it doesn't recognize an object | |
1086 | it will call the to_xfer_partial of the next target down. | |
1087 | But for memory this won't do. Memory is the only target | |
9b409511 YQ |
1088 | object which can be read from more than one valid target. |
1089 | A core file, for instance, could have some of memory but | |
1090 | delegate other bits to the target below it. So, we must | |
1091 | manually try all targets. */ | |
1092 | ||
1093 | res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, | |
1094 | xfered_len); | |
cf7a04e8 DJ |
1095 | |
1096 | /* If we still haven't got anything, return the last error. We | |
1097 | give up. */ | |
1098 | return res; | |
0779438d AC |
1099 | } |
1100 | ||
f0ba3972 PA |
1101 | /* Perform a partial memory transfer. For docs see target.h, |
1102 | to_xfer_partial. */ | |
1103 | ||
9b409511 | 1104 | static enum target_xfer_status |
f0ba3972 | 1105 | memory_xfer_partial (struct target_ops *ops, enum target_object object, |
9b409511 YQ |
1106 | gdb_byte *readbuf, const gdb_byte *writebuf, |
1107 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
f0ba3972 | 1108 | { |
9b409511 | 1109 | enum target_xfer_status res; |
f0ba3972 PA |
1110 | |
1111 | /* Zero length requests are ok and require no work. */ | |
1112 | if (len == 0) | |
9b409511 | 1113 | return TARGET_XFER_EOF; |
f0ba3972 | 1114 | |
a738ea1d YQ |
1115 | memaddr = address_significant (target_gdbarch (), memaddr); |
1116 | ||
f0ba3972 PA |
1117 | /* Fill in READBUF with breakpoint shadows, or WRITEBUF with |
1118 | breakpoint insns, thus hiding out from higher layers whether | |
1119 | there are software breakpoints inserted in the code stream. */ | |
1120 | if (readbuf != NULL) | |
1121 | { | |
9b409511 YQ |
1122 | res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
1123 | xfered_len); | |
f0ba3972 | 1124 | |
9b409511 | 1125 | if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
c63528fc | 1126 | breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
f0ba3972 PA |
1127 | } |
1128 | else | |
1129 | { | |
67c059c2 AB |
1130 | /* A large write request is likely to be partially satisfied |
1131 | by memory_xfer_partial_1. We will continually malloc | |
1132 | and free a copy of the entire write request for breakpoint | |
1133 | shadow handling even though we only end up writing a small | |
09c98b44 DB |
1134 | subset of it. Cap writes to a limit specified by the target |
1135 | to mitigate this. */ | |
f6ac5f3d | 1136 | len = std::min (ops->get_memory_xfer_limit (), len); |
67c059c2 | 1137 | |
26fcd5d7 TT |
1138 | gdb::byte_vector buf (writebuf, writebuf + len); |
1139 | breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len); | |
1140 | res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len, | |
9b409511 | 1141 | xfered_len); |
f0ba3972 PA |
1142 | } |
1143 | ||
1144 | return res; | |
1145 | } | |
1146 | ||
cb85b21b TT |
1147 | scoped_restore_tmpl<int> |
1148 | make_scoped_restore_show_memory_breakpoints (int show) | |
8defab1a | 1149 | { |
cb85b21b | 1150 | return make_scoped_restore (&show_memory_breakpoints, show); |
8defab1a DJ |
1151 | } |
1152 | ||
7f79c47e DE |
1153 | /* For docs see target.h, to_xfer_partial. */ |
1154 | ||
9b409511 | 1155 | enum target_xfer_status |
27394598 AC |
1156 | target_xfer_partial (struct target_ops *ops, |
1157 | enum target_object object, const char *annex, | |
4ac248ca | 1158 | gdb_byte *readbuf, const gdb_byte *writebuf, |
9b409511 YQ |
1159 | ULONGEST offset, ULONGEST len, |
1160 | ULONGEST *xfered_len) | |
27394598 | 1161 | { |
9b409511 | 1162 | enum target_xfer_status retval; |
27394598 | 1163 | |
ce6d0892 YQ |
1164 | /* Transfer is done when LEN is zero. */ |
1165 | if (len == 0) | |
9b409511 | 1166 | return TARGET_XFER_EOF; |
ce6d0892 | 1167 | |
d914c394 SS |
1168 | if (writebuf && !may_write_memory) |
1169 | error (_("Writing to memory is not allowed (addr %s, len %s)"), | |
1170 | core_addr_to_string_nz (offset), plongest (len)); | |
1171 | ||
9b409511 YQ |
1172 | *xfered_len = 0; |
1173 | ||
cf7a04e8 DJ |
1174 | /* If this is a memory transfer, let the memory-specific code |
1175 | have a look at it instead. Memory transfers are more | |
1176 | complicated. */ | |
29453a14 YQ |
1177 | if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
1178 | || object == TARGET_OBJECT_CODE_MEMORY) | |
4e5d721f | 1179 | retval = memory_xfer_partial (ops, object, readbuf, |
9b409511 | 1180 | writebuf, offset, len, xfered_len); |
9f713294 | 1181 | else if (object == TARGET_OBJECT_RAW_MEMORY) |
cf7a04e8 | 1182 | { |
0fec99e8 PA |
1183 | /* Skip/avoid accessing the target if the memory region |
1184 | attributes block the access. Check this here instead of in | |
1185 | raw_memory_xfer_partial as otherwise we'd end up checking | |
1186 | this twice in the case of the memory_xfer_partial path is | |
1187 | taken; once before checking the dcache, and another in the | |
1188 | tail call to raw_memory_xfer_partial. */ | |
1189 | if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, | |
1190 | NULL)) | |
1191 | return TARGET_XFER_E_IO; | |
1192 | ||
9f713294 | 1193 | /* Request the normal memory object from other layers. */ |
9b409511 YQ |
1194 | retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
1195 | xfered_len); | |
cf7a04e8 | 1196 | } |
9f713294 | 1197 | else |
f6ac5f3d PA |
1198 | retval = ops->xfer_partial (object, annex, readbuf, |
1199 | writebuf, offset, len, xfered_len); | |
cf7a04e8 | 1200 | |
27394598 AC |
1201 | if (targetdebug) |
1202 | { | |
1203 | const unsigned char *myaddr = NULL; | |
1204 | ||
1205 | fprintf_unfiltered (gdb_stdlog, | |
3e43a32a | 1206 | "%s:target_xfer_partial " |
9b409511 | 1207 | "(%d, %s, %s, %s, %s, %s) = %d, %s", |
f6ac5f3d | 1208 | ops->shortname (), |
27394598 AC |
1209 | (int) object, |
1210 | (annex ? annex : "(null)"), | |
53b71562 JB |
1211 | host_address_to_string (readbuf), |
1212 | host_address_to_string (writebuf), | |
0b1553bc | 1213 | core_addr_to_string_nz (offset), |
9b409511 YQ |
1214 | pulongest (len), retval, |
1215 | pulongest (*xfered_len)); | |
27394598 AC |
1216 | |
1217 | if (readbuf) | |
1218 | myaddr = readbuf; | |
1219 | if (writebuf) | |
1220 | myaddr = writebuf; | |
9b409511 | 1221 | if (retval == TARGET_XFER_OK && myaddr != NULL) |
27394598 AC |
1222 | { |
1223 | int i; | |
2bc416ba | 1224 | |
27394598 | 1225 | fputs_unfiltered (", bytes =", gdb_stdlog); |
9b409511 | 1226 | for (i = 0; i < *xfered_len; i++) |
27394598 | 1227 | { |
53b71562 | 1228 | if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
27394598 AC |
1229 | { |
1230 | if (targetdebug < 2 && i > 0) | |
1231 | { | |
1232 | fprintf_unfiltered (gdb_stdlog, " ..."); | |
1233 | break; | |
1234 | } | |
1235 | fprintf_unfiltered (gdb_stdlog, "\n"); | |
1236 | } | |
2bc416ba | 1237 | |
27394598 AC |
1238 | fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
1239 | } | |
1240 | } | |
2bc416ba | 1241 | |
27394598 AC |
1242 | fputc_unfiltered ('\n', gdb_stdlog); |
1243 | } | |
9b409511 YQ |
1244 | |
1245 | /* Check implementations of to_xfer_partial update *XFERED_LEN | |
1246 | properly. Do assertion after printing debug messages, so that we | |
1247 | can find more clues on assertion failure from debugging messages. */ | |
bc113b4e | 1248 | if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
9b409511 YQ |
1249 | gdb_assert (*xfered_len > 0); |
1250 | ||
27394598 AC |
1251 | return retval; |
1252 | } | |
1253 | ||
578d3588 PA |
1254 | /* Read LEN bytes of target memory at address MEMADDR, placing the |
1255 | results in GDB's memory at MYADDR. Returns either 0 for success or | |
d09f2c3f | 1256 | -1 if any error occurs. |
c906108c SS |
1257 | |
1258 | If an error occurs, no guarantee is made about the contents of the data at | |
1259 | MYADDR. In particular, the caller should not depend upon partial reads | |
1260 | filling the buffer with good data. There is no way for the caller to know | |
1261 | how much good data might have been transfered anyway. Callers that can | |
cf7a04e8 | 1262 | deal with partial reads should call target_read (which will retry until |
c378eb4e | 1263 | it makes no progress, and then return how much was transferred). */ |
c906108c SS |
1264 | |
1265 | int | |
1b162304 | 1266 | target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
c906108c | 1267 | { |
8b88a78e | 1268 | if (target_read (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1269 | myaddr, memaddr, len) == len) |
1270 | return 0; | |
0779438d | 1271 | else |
d09f2c3f | 1272 | return -1; |
c906108c SS |
1273 | } |
1274 | ||
721ec300 GB |
1275 | /* See target/target.h. */ |
1276 | ||
1277 | int | |
1278 | target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) | |
1279 | { | |
1280 | gdb_byte buf[4]; | |
1281 | int r; | |
1282 | ||
1283 | r = target_read_memory (memaddr, buf, sizeof buf); | |
1284 | if (r != 0) | |
1285 | return r; | |
1286 | *result = extract_unsigned_integer (buf, sizeof buf, | |
1287 | gdbarch_byte_order (target_gdbarch ())); | |
1288 | return 0; | |
1289 | } | |
1290 | ||
aee4bf85 PA |
1291 | /* Like target_read_memory, but specify explicitly that this is a read |
1292 | from the target's raw memory. That is, this read bypasses the | |
1293 | dcache, breakpoint shadowing, etc. */ | |
1294 | ||
1295 | int | |
1296 | target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1297 | { | |
8b88a78e | 1298 | if (target_read (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
aee4bf85 PA |
1299 | myaddr, memaddr, len) == len) |
1300 | return 0; | |
1301 | else | |
d09f2c3f | 1302 | return -1; |
aee4bf85 PA |
1303 | } |
1304 | ||
4e5d721f DE |
1305 | /* Like target_read_memory, but specify explicitly that this is a read from |
1306 | the target's stack. This may trigger different cache behavior. */ | |
1307 | ||
1308 | int | |
45aa4659 | 1309 | target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
4e5d721f | 1310 | { |
8b88a78e | 1311 | if (target_read (current_top_target (), TARGET_OBJECT_STACK_MEMORY, NULL, |
4e5d721f DE |
1312 | myaddr, memaddr, len) == len) |
1313 | return 0; | |
1314 | else | |
d09f2c3f | 1315 | return -1; |
4e5d721f DE |
1316 | } |
1317 | ||
29453a14 YQ |
1318 | /* Like target_read_memory, but specify explicitly that this is a read from |
1319 | the target's code. This may trigger different cache behavior. */ | |
1320 | ||
1321 | int | |
1322 | target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) | |
1323 | { | |
8b88a78e | 1324 | if (target_read (current_top_target (), TARGET_OBJECT_CODE_MEMORY, NULL, |
29453a14 YQ |
1325 | myaddr, memaddr, len) == len) |
1326 | return 0; | |
1327 | else | |
d09f2c3f | 1328 | return -1; |
29453a14 YQ |
1329 | } |
1330 | ||
7f79c47e | 1331 | /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
d09f2c3f PA |
1332 | Returns either 0 for success or -1 if any error occurs. If an |
1333 | error occurs, no guarantee is made about how much data got written. | |
1334 | Callers that can deal with partial writes should call | |
1335 | target_write. */ | |
7f79c47e | 1336 | |
c906108c | 1337 | int |
45aa4659 | 1338 | target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
c906108c | 1339 | { |
8b88a78e | 1340 | if (target_write (current_top_target (), TARGET_OBJECT_MEMORY, NULL, |
cf7a04e8 DJ |
1341 | myaddr, memaddr, len) == len) |
1342 | return 0; | |
0779438d | 1343 | else |
d09f2c3f | 1344 | return -1; |
c906108c | 1345 | } |
c5aa993b | 1346 | |
f0ba3972 | 1347 | /* Write LEN bytes from MYADDR to target raw memory at address |
d09f2c3f PA |
1348 | MEMADDR. Returns either 0 for success or -1 if any error occurs. |
1349 | If an error occurs, no guarantee is made about how much data got | |
1350 | written. Callers that can deal with partial writes should call | |
1351 | target_write. */ | |
f0ba3972 PA |
1352 | |
1353 | int | |
45aa4659 | 1354 | target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
f0ba3972 | 1355 | { |
8b88a78e | 1356 | if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
f0ba3972 PA |
1357 | myaddr, memaddr, len) == len) |
1358 | return 0; | |
1359 | else | |
d09f2c3f | 1360 | return -1; |
f0ba3972 PA |
1361 | } |
1362 | ||
fd79ecee DJ |
1363 | /* Fetch the target's memory map. */ |
1364 | ||
a664f67e | 1365 | std::vector<mem_region> |
fd79ecee DJ |
1366 | target_memory_map (void) |
1367 | { | |
8b88a78e | 1368 | std::vector<mem_region> result = current_top_target ()->memory_map (); |
a664f67e SM |
1369 | if (result.empty ()) |
1370 | return result; | |
fd79ecee | 1371 | |
a664f67e | 1372 | std::sort (result.begin (), result.end ()); |
fd79ecee DJ |
1373 | |
1374 | /* Check that regions do not overlap. Simultaneously assign | |
1375 | a numbering for the "mem" commands to use to refer to | |
1376 | each region. */ | |
a664f67e SM |
1377 | mem_region *last_one = NULL; |
1378 | for (size_t ix = 0; ix < result.size (); ix++) | |
fd79ecee | 1379 | { |
a664f67e | 1380 | mem_region *this_one = &result[ix]; |
fd79ecee DJ |
1381 | this_one->number = ix; |
1382 | ||
a664f67e | 1383 | if (last_one != NULL && last_one->hi > this_one->lo) |
fd79ecee DJ |
1384 | { |
1385 | warning (_("Overlapping regions in memory map: ignoring")); | |
a664f67e | 1386 | return std::vector<mem_region> (); |
fd79ecee | 1387 | } |
a664f67e | 1388 | |
fd79ecee DJ |
1389 | last_one = this_one; |
1390 | } | |
1391 | ||
1392 | return result; | |
1393 | } | |
1394 | ||
a76d924d DJ |
1395 | void |
1396 | target_flash_erase (ULONGEST address, LONGEST length) | |
1397 | { | |
8b88a78e | 1398 | current_top_target ()->flash_erase (address, length); |
a76d924d DJ |
1399 | } |
1400 | ||
1401 | void | |
1402 | target_flash_done (void) | |
1403 | { | |
8b88a78e | 1404 | current_top_target ()->flash_done (); |
a76d924d DJ |
1405 | } |
1406 | ||
920d2a44 AC |
1407 | static void |
1408 | show_trust_readonly (struct ui_file *file, int from_tty, | |
1409 | struct cmd_list_element *c, const char *value) | |
1410 | { | |
3e43a32a MS |
1411 | fprintf_filtered (file, |
1412 | _("Mode for reading from readonly sections is %s.\n"), | |
920d2a44 AC |
1413 | value); |
1414 | } | |
3a11626d | 1415 | |
7f79c47e | 1416 | /* Target vector read/write partial wrapper functions. */ |
0088c768 | 1417 | |
9b409511 | 1418 | static enum target_xfer_status |
1e3ff5ad AC |
1419 | target_read_partial (struct target_ops *ops, |
1420 | enum target_object object, | |
1b0ba102 | 1421 | const char *annex, gdb_byte *buf, |
9b409511 YQ |
1422 | ULONGEST offset, ULONGEST len, |
1423 | ULONGEST *xfered_len) | |
1e3ff5ad | 1424 | { |
9b409511 YQ |
1425 | return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
1426 | xfered_len); | |
1e3ff5ad AC |
1427 | } |
1428 | ||
8a55ffb0 | 1429 | static enum target_xfer_status |
1e3ff5ad AC |
1430 | target_write_partial (struct target_ops *ops, |
1431 | enum target_object object, | |
1b0ba102 | 1432 | const char *annex, const gdb_byte *buf, |
9b409511 | 1433 | ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
1e3ff5ad | 1434 | { |
9b409511 YQ |
1435 | return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
1436 | xfered_len); | |
1e3ff5ad AC |
1437 | } |
1438 | ||
1439 | /* Wrappers to perform the full transfer. */ | |
7f79c47e DE |
1440 | |
1441 | /* For docs on target_read see target.h. */ | |
1442 | ||
1e3ff5ad AC |
1443 | LONGEST |
1444 | target_read (struct target_ops *ops, | |
1445 | enum target_object object, | |
1b0ba102 | 1446 | const char *annex, gdb_byte *buf, |
1e3ff5ad AC |
1447 | ULONGEST offset, LONGEST len) |
1448 | { | |
279a6fed | 1449 | LONGEST xfered_total = 0; |
d309493c SM |
1450 | int unit_size = 1; |
1451 | ||
1452 | /* If we are reading from a memory object, find the length of an addressable | |
1453 | unit for that architecture. */ | |
1454 | if (object == TARGET_OBJECT_MEMORY | |
1455 | || object == TARGET_OBJECT_STACK_MEMORY | |
1456 | || object == TARGET_OBJECT_CODE_MEMORY | |
1457 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1458 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
5d502164 | 1459 | |
279a6fed | 1460 | while (xfered_total < len) |
1e3ff5ad | 1461 | { |
279a6fed | 1462 | ULONGEST xfered_partial; |
9b409511 YQ |
1463 | enum target_xfer_status status; |
1464 | ||
1465 | status = target_read_partial (ops, object, annex, | |
d309493c | 1466 | buf + xfered_total * unit_size, |
279a6fed SM |
1467 | offset + xfered_total, len - xfered_total, |
1468 | &xfered_partial); | |
5d502164 | 1469 | |
1e3ff5ad | 1470 | /* Call an observer, notifying them of the xfer progress? */ |
9b409511 | 1471 | if (status == TARGET_XFER_EOF) |
279a6fed | 1472 | return xfered_total; |
9b409511 YQ |
1473 | else if (status == TARGET_XFER_OK) |
1474 | { | |
279a6fed | 1475 | xfered_total += xfered_partial; |
9b409511 YQ |
1476 | QUIT; |
1477 | } | |
1478 | else | |
279a6fed | 1479 | return TARGET_XFER_E_IO; |
9b409511 | 1480 | |
1e3ff5ad AC |
1481 | } |
1482 | return len; | |
1483 | } | |
1484 | ||
f1a507a1 JB |
1485 | /* Assuming that the entire [begin, end) range of memory cannot be |
1486 | read, try to read whatever subrange is possible to read. | |
1487 | ||
1488 | The function returns, in RESULT, either zero or one memory block. | |
1489 | If there's a readable subrange at the beginning, it is completely | |
1490 | read and returned. Any further readable subrange will not be read. | |
1491 | Otherwise, if there's a readable subrange at the end, it will be | |
1492 | completely read and returned. Any readable subranges before it | |
1493 | (obviously, not starting at the beginning), will be ignored. In | |
1494 | other cases -- either no readable subrange, or readable subrange(s) | |
1495 | that is neither at the beginning, or end, nothing is returned. | |
1496 | ||
1497 | The purpose of this function is to handle a read across a boundary | |
1498 | of accessible memory in a case when memory map is not available. | |
1499 | The above restrictions are fine for this case, but will give | |
1500 | incorrect results if the memory is 'patchy'. However, supporting | |
1501 | 'patchy' memory would require trying to read every single byte, | |
1502 | and it seems unacceptable solution. Explicit memory map is | |
1503 | recommended for this case -- and target_read_memory_robust will | |
1504 | take care of reading multiple ranges then. */ | |
8dedea02 VP |
1505 | |
1506 | static void | |
3e43a32a | 1507 | read_whatever_is_readable (struct target_ops *ops, |
279a6fed | 1508 | const ULONGEST begin, const ULONGEST end, |
d309493c | 1509 | int unit_size, |
386c8614 | 1510 | std::vector<memory_read_result> *result) |
d5086790 | 1511 | { |
8dedea02 VP |
1512 | ULONGEST current_begin = begin; |
1513 | ULONGEST current_end = end; | |
1514 | int forward; | |
9b409511 | 1515 | ULONGEST xfered_len; |
8dedea02 VP |
1516 | |
1517 | /* If we previously failed to read 1 byte, nothing can be done here. */ | |
1518 | if (end - begin <= 1) | |
386c8614 TT |
1519 | return; |
1520 | ||
1521 | gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin)); | |
8dedea02 VP |
1522 | |
1523 | /* Check that either first or the last byte is readable, and give up | |
c378eb4e | 1524 | if not. This heuristic is meant to permit reading accessible memory |
8dedea02 VP |
1525 | at the boundary of accessible region. */ |
1526 | if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1527 | buf.get (), begin, 1, &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1528 | { |
1529 | forward = 1; | |
1530 | ++current_begin; | |
1531 | } | |
1532 | else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1533 | buf.get () + (end - begin) - 1, end - 1, 1, |
9b409511 | 1534 | &xfered_len) == TARGET_XFER_OK) |
8dedea02 VP |
1535 | { |
1536 | forward = 0; | |
1537 | --current_end; | |
1538 | } | |
1539 | else | |
386c8614 | 1540 | return; |
8dedea02 VP |
1541 | |
1542 | /* Loop invariant is that the [current_begin, current_end) was previously | |
1543 | found to be not readable as a whole. | |
1544 | ||
1545 | Note loop condition -- if the range has 1 byte, we can't divide the range | |
1546 | so there's no point trying further. */ | |
1547 | while (current_end - current_begin > 1) | |
1548 | { | |
1549 | ULONGEST first_half_begin, first_half_end; | |
1550 | ULONGEST second_half_begin, second_half_end; | |
1551 | LONGEST xfer; | |
279a6fed | 1552 | ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
f1a507a1 | 1553 | |
8dedea02 VP |
1554 | if (forward) |
1555 | { | |
1556 | first_half_begin = current_begin; | |
1557 | first_half_end = middle; | |
1558 | second_half_begin = middle; | |
1559 | second_half_end = current_end; | |
1560 | } | |
1561 | else | |
1562 | { | |
1563 | first_half_begin = middle; | |
1564 | first_half_end = current_end; | |
1565 | second_half_begin = current_begin; | |
1566 | second_half_end = middle; | |
1567 | } | |
1568 | ||
1569 | xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
386c8614 | 1570 | buf.get () + (first_half_begin - begin) * unit_size, |
8dedea02 VP |
1571 | first_half_begin, |
1572 | first_half_end - first_half_begin); | |
1573 | ||
1574 | if (xfer == first_half_end - first_half_begin) | |
1575 | { | |
c378eb4e | 1576 | /* This half reads up fine. So, the error must be in the |
3e43a32a | 1577 | other half. */ |
8dedea02 VP |
1578 | current_begin = second_half_begin; |
1579 | current_end = second_half_end; | |
1580 | } | |
1581 | else | |
1582 | { | |
c378eb4e | 1583 | /* This half is not readable. Because we've tried one byte, we |
279a6fed | 1584 | know some part of this half if actually readable. Go to the next |
8dedea02 VP |
1585 | iteration to divide again and try to read. |
1586 | ||
1587 | We don't handle the other half, because this function only tries | |
1588 | to read a single readable subrange. */ | |
1589 | current_begin = first_half_begin; | |
1590 | current_end = first_half_end; | |
1591 | } | |
1592 | } | |
1593 | ||
1594 | if (forward) | |
1595 | { | |
1596 | /* The [begin, current_begin) range has been read. */ | |
386c8614 | 1597 | result->emplace_back (begin, current_end, std::move (buf)); |
8dedea02 VP |
1598 | } |
1599 | else | |
1600 | { | |
1601 | /* The [current_end, end) range has been read. */ | |
279a6fed | 1602 | LONGEST region_len = end - current_end; |
f1a507a1 | 1603 | |
386c8614 TT |
1604 | gdb::unique_xmalloc_ptr<gdb_byte> data |
1605 | ((gdb_byte *) xmalloc (region_len * unit_size)); | |
1606 | memcpy (data.get (), buf.get () + (current_end - begin) * unit_size, | |
d309493c | 1607 | region_len * unit_size); |
386c8614 | 1608 | result->emplace_back (current_end, end, std::move (data)); |
8dedea02 | 1609 | } |
8dedea02 VP |
1610 | } |
1611 | ||
386c8614 | 1612 | std::vector<memory_read_result> |
279a6fed SM |
1613 | read_memory_robust (struct target_ops *ops, |
1614 | const ULONGEST offset, const LONGEST len) | |
8dedea02 | 1615 | { |
386c8614 | 1616 | std::vector<memory_read_result> result; |
d309493c | 1617 | int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
8dedea02 | 1618 | |
279a6fed SM |
1619 | LONGEST xfered_total = 0; |
1620 | while (xfered_total < len) | |
d5086790 | 1621 | { |
279a6fed SM |
1622 | struct mem_region *region = lookup_mem_region (offset + xfered_total); |
1623 | LONGEST region_len; | |
5d502164 | 1624 | |
8dedea02 VP |
1625 | /* If there is no explicit region, a fake one should be created. */ |
1626 | gdb_assert (region); | |
1627 | ||
1628 | if (region->hi == 0) | |
279a6fed | 1629 | region_len = len - xfered_total; |
8dedea02 | 1630 | else |
279a6fed | 1631 | region_len = region->hi - offset; |
8dedea02 VP |
1632 | |
1633 | if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) | |
d5086790 | 1634 | { |
c378eb4e | 1635 | /* Cannot read this region. Note that we can end up here only |
8dedea02 VP |
1636 | if the region is explicitly marked inaccessible, or |
1637 | 'inaccessible-by-default' is in effect. */ | |
279a6fed | 1638 | xfered_total += region_len; |
8dedea02 VP |
1639 | } |
1640 | else | |
1641 | { | |
325fac50 | 1642 | LONGEST to_read = std::min (len - xfered_total, region_len); |
386c8614 TT |
1643 | gdb::unique_xmalloc_ptr<gdb_byte> buffer |
1644 | ((gdb_byte *) xmalloc (to_read * unit_size)); | |
8dedea02 | 1645 | |
279a6fed | 1646 | LONGEST xfered_partial = |
386c8614 | 1647 | target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (), |
279a6fed | 1648 | offset + xfered_total, to_read); |
8dedea02 | 1649 | /* Call an observer, notifying them of the xfer progress? */ |
279a6fed | 1650 | if (xfered_partial <= 0) |
d5086790 | 1651 | { |
c378eb4e | 1652 | /* Got an error reading full chunk. See if maybe we can read |
8dedea02 | 1653 | some subrange. */ |
e084c964 DB |
1654 | read_whatever_is_readable (ops, offset + xfered_total, |
1655 | offset + xfered_total + to_read, | |
1656 | unit_size, &result); | |
279a6fed | 1657 | xfered_total += to_read; |
d5086790 | 1658 | } |
8dedea02 VP |
1659 | else |
1660 | { | |
386c8614 TT |
1661 | result.emplace_back (offset + xfered_total, |
1662 | offset + xfered_total + xfered_partial, | |
1663 | std::move (buffer)); | |
279a6fed | 1664 | xfered_total += xfered_partial; |
8dedea02 VP |
1665 | } |
1666 | QUIT; | |
d5086790 | 1667 | } |
d5086790 | 1668 | } |
9d78f827 | 1669 | |
8dedea02 | 1670 | return result; |
d5086790 VP |
1671 | } |
1672 | ||
8dedea02 | 1673 | |
cf7a04e8 DJ |
1674 | /* An alternative to target_write with progress callbacks. */ |
1675 | ||
1e3ff5ad | 1676 | LONGEST |
cf7a04e8 DJ |
1677 | target_write_with_progress (struct target_ops *ops, |
1678 | enum target_object object, | |
1679 | const char *annex, const gdb_byte *buf, | |
1680 | ULONGEST offset, LONGEST len, | |
1681 | void (*progress) (ULONGEST, void *), void *baton) | |
1e3ff5ad | 1682 | { |
279a6fed | 1683 | LONGEST xfered_total = 0; |
d309493c SM |
1684 | int unit_size = 1; |
1685 | ||
1686 | /* If we are writing to a memory object, find the length of an addressable | |
1687 | unit for that architecture. */ | |
1688 | if (object == TARGET_OBJECT_MEMORY | |
1689 | || object == TARGET_OBJECT_STACK_MEMORY | |
1690 | || object == TARGET_OBJECT_CODE_MEMORY | |
1691 | || object == TARGET_OBJECT_RAW_MEMORY) | |
1692 | unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); | |
a76d924d DJ |
1693 | |
1694 | /* Give the progress callback a chance to set up. */ | |
1695 | if (progress) | |
1696 | (*progress) (0, baton); | |
1697 | ||
279a6fed | 1698 | while (xfered_total < len) |
1e3ff5ad | 1699 | { |
279a6fed | 1700 | ULONGEST xfered_partial; |
9b409511 YQ |
1701 | enum target_xfer_status status; |
1702 | ||
1703 | status = target_write_partial (ops, object, annex, | |
d309493c | 1704 | buf + xfered_total * unit_size, |
279a6fed SM |
1705 | offset + xfered_total, len - xfered_total, |
1706 | &xfered_partial); | |
cf7a04e8 | 1707 | |
5c328c05 | 1708 | if (status != TARGET_XFER_OK) |
279a6fed | 1709 | return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
cf7a04e8 DJ |
1710 | |
1711 | if (progress) | |
279a6fed | 1712 | (*progress) (xfered_partial, baton); |
cf7a04e8 | 1713 | |
279a6fed | 1714 | xfered_total += xfered_partial; |
1e3ff5ad AC |
1715 | QUIT; |
1716 | } | |
1717 | return len; | |
1718 | } | |
1719 | ||
7f79c47e DE |
1720 | /* For docs on target_write see target.h. */ |
1721 | ||
cf7a04e8 DJ |
1722 | LONGEST |
1723 | target_write (struct target_ops *ops, | |
1724 | enum target_object object, | |
1725 | const char *annex, const gdb_byte *buf, | |
1726 | ULONGEST offset, LONGEST len) | |
1727 | { | |
1728 | return target_write_with_progress (ops, object, annex, buf, offset, len, | |
1729 | NULL, NULL); | |
1730 | } | |
1731 | ||
9018be22 SM |
1732 | /* Help for target_read_alloc and target_read_stralloc. See their comments |
1733 | for details. */ | |
13547ab6 | 1734 | |
9018be22 SM |
1735 | template <typename T> |
1736 | gdb::optional<gdb::def_vector<T>> | |
159f81f3 | 1737 | target_read_alloc_1 (struct target_ops *ops, enum target_object object, |
9018be22 | 1738 | const char *annex) |
13547ab6 | 1739 | { |
9018be22 SM |
1740 | gdb::def_vector<T> buf; |
1741 | size_t buf_pos = 0; | |
1742 | const int chunk = 4096; | |
13547ab6 DJ |
1743 | |
1744 | /* This function does not have a length parameter; it reads the | |
1745 | entire OBJECT). Also, it doesn't support objects fetched partly | |
1746 | from one target and partly from another (in a different stratum, | |
1747 | e.g. a core file and an executable). Both reasons make it | |
1748 | unsuitable for reading memory. */ | |
1749 | gdb_assert (object != TARGET_OBJECT_MEMORY); | |
1750 | ||
1751 | /* Start by reading up to 4K at a time. The target will throttle | |
1752 | this number down if necessary. */ | |
13547ab6 DJ |
1753 | while (1) |
1754 | { | |
9b409511 YQ |
1755 | ULONGEST xfered_len; |
1756 | enum target_xfer_status status; | |
1757 | ||
9018be22 SM |
1758 | buf.resize (buf_pos + chunk); |
1759 | ||
1760 | status = target_read_partial (ops, object, annex, | |
1761 | (gdb_byte *) &buf[buf_pos], | |
1762 | buf_pos, chunk, | |
9b409511 YQ |
1763 | &xfered_len); |
1764 | ||
1765 | if (status == TARGET_XFER_EOF) | |
13547ab6 DJ |
1766 | { |
1767 | /* Read all there was. */ | |
9018be22 SM |
1768 | buf.resize (buf_pos); |
1769 | return buf; | |
13547ab6 | 1770 | } |
9b409511 YQ |
1771 | else if (status != TARGET_XFER_OK) |
1772 | { | |
1773 | /* An error occurred. */ | |
9018be22 | 1774 | return {}; |
9b409511 | 1775 | } |
13547ab6 | 1776 | |
9b409511 | 1777 | buf_pos += xfered_len; |
13547ab6 | 1778 | |
13547ab6 DJ |
1779 | QUIT; |
1780 | } | |
1781 | } | |
1782 | ||
9018be22 | 1783 | /* See target.h */ |
159f81f3 | 1784 | |
9018be22 | 1785 | gdb::optional<gdb::byte_vector> |
159f81f3 | 1786 | target_read_alloc (struct target_ops *ops, enum target_object object, |
9018be22 | 1787 | const char *annex) |
159f81f3 | 1788 | { |
9018be22 | 1789 | return target_read_alloc_1<gdb_byte> (ops, object, annex); |
159f81f3 DJ |
1790 | } |
1791 | ||
b7b030ad | 1792 | /* See target.h. */ |
159f81f3 | 1793 | |
9018be22 | 1794 | gdb::optional<gdb::char_vector> |
159f81f3 DJ |
1795 | target_read_stralloc (struct target_ops *ops, enum target_object object, |
1796 | const char *annex) | |
1797 | { | |
9018be22 SM |
1798 | gdb::optional<gdb::char_vector> buf |
1799 | = target_read_alloc_1<char> (ops, object, annex); | |
159f81f3 | 1800 | |
9018be22 SM |
1801 | if (!buf) |
1802 | return {}; | |
159f81f3 | 1803 | |
d00a27c5 | 1804 | if (buf->empty () || buf->back () != '\0') |
9018be22 | 1805 | buf->push_back ('\0'); |
7313baad UW |
1806 | |
1807 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
9018be22 SM |
1808 | for (auto it = std::find (buf->begin (), buf->end (), '\0'); |
1809 | it != buf->end (); it++) | |
1810 | if (*it != '\0') | |
7313baad UW |
1811 | { |
1812 | warning (_("target object %d, annex %s, " | |
1813 | "contained unexpected null characters"), | |
1814 | (int) object, annex ? annex : "(none)"); | |
1815 | break; | |
1816 | } | |
159f81f3 | 1817 | |
9018be22 | 1818 | return buf; |
159f81f3 DJ |
1819 | } |
1820 | ||
b6591e8b AC |
1821 | /* Memory transfer methods. */ |
1822 | ||
1823 | void | |
1b0ba102 | 1824 | get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
b6591e8b AC |
1825 | LONGEST len) |
1826 | { | |
07b82ea5 PA |
1827 | /* This method is used to read from an alternate, non-current |
1828 | target. This read must bypass the overlay support (as symbols | |
1829 | don't match this target), and GDB's internal cache (wrong cache | |
1830 | for this target). */ | |
1831 | if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) | |
b6591e8b | 1832 | != len) |
578d3588 | 1833 | memory_error (TARGET_XFER_E_IO, addr); |
b6591e8b AC |
1834 | } |
1835 | ||
1836 | ULONGEST | |
5d502164 MS |
1837 | get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
1838 | int len, enum bfd_endian byte_order) | |
b6591e8b | 1839 | { |
f6519ebc | 1840 | gdb_byte buf[sizeof (ULONGEST)]; |
b6591e8b AC |
1841 | |
1842 | gdb_assert (len <= sizeof (buf)); | |
1843 | get_target_memory (ops, addr, buf, len); | |
e17a4113 | 1844 | return extract_unsigned_integer (buf, len, byte_order); |
b6591e8b AC |
1845 | } |
1846 | ||
3db08215 MM |
1847 | /* See target.h. */ |
1848 | ||
d914c394 SS |
1849 | int |
1850 | target_insert_breakpoint (struct gdbarch *gdbarch, | |
1851 | struct bp_target_info *bp_tgt) | |
1852 | { | |
1853 | if (!may_insert_breakpoints) | |
1854 | { | |
1855 | warning (_("May not insert breakpoints")); | |
1856 | return 1; | |
1857 | } | |
1858 | ||
8b88a78e | 1859 | return current_top_target ()->insert_breakpoint (gdbarch, bp_tgt); |
d914c394 SS |
1860 | } |
1861 | ||
3db08215 MM |
1862 | /* See target.h. */ |
1863 | ||
d914c394 | 1864 | int |
6b84065d | 1865 | target_remove_breakpoint (struct gdbarch *gdbarch, |
73971819 PA |
1866 | struct bp_target_info *bp_tgt, |
1867 | enum remove_bp_reason reason) | |
d914c394 SS |
1868 | { |
1869 | /* This is kind of a weird case to handle, but the permission might | |
1870 | have been changed after breakpoints were inserted - in which case | |
1871 | we should just take the user literally and assume that any | |
1872 | breakpoints should be left in place. */ | |
1873 | if (!may_insert_breakpoints) | |
1874 | { | |
1875 | warning (_("May not remove breakpoints")); | |
1876 | return 1; | |
1877 | } | |
1878 | ||
8b88a78e | 1879 | return current_top_target ()->remove_breakpoint (gdbarch, bp_tgt, reason); |
d914c394 SS |
1880 | } |
1881 | ||
c906108c | 1882 | static void |
1d12d88f | 1883 | info_target_command (const char *args, int from_tty) |
c906108c | 1884 | { |
c906108c | 1885 | int has_all_mem = 0; |
c5aa993b | 1886 | |
c906108c | 1887 | if (symfile_objfile != NULL) |
4262abfb JK |
1888 | printf_unfiltered (_("Symbols from \"%s\".\n"), |
1889 | objfile_name (symfile_objfile)); | |
c906108c | 1890 | |
b6a8c27b | 1891 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
c906108c | 1892 | { |
f6ac5f3d | 1893 | if (!t->has_memory ()) |
c906108c SS |
1894 | continue; |
1895 | ||
66b4deae | 1896 | if ((int) (t->stratum ()) <= (int) dummy_stratum) |
c906108c SS |
1897 | continue; |
1898 | if (has_all_mem) | |
3e43a32a MS |
1899 | printf_unfiltered (_("\tWhile running this, " |
1900 | "GDB does not access memory from...\n")); | |
f6ac5f3d PA |
1901 | printf_unfiltered ("%s:\n", t->longname ()); |
1902 | t->files_info (); | |
1903 | has_all_mem = t->has_all_memory (); | |
c906108c SS |
1904 | } |
1905 | } | |
1906 | ||
fd79ecee DJ |
1907 | /* This function is called before any new inferior is created, e.g. |
1908 | by running a program, attaching, or connecting to a target. | |
1909 | It cleans up any state from previous invocations which might | |
1910 | change between runs. This is a subset of what target_preopen | |
1911 | resets (things which might change between targets). */ | |
1912 | ||
1913 | void | |
1914 | target_pre_inferior (int from_tty) | |
1915 | { | |
c378eb4e | 1916 | /* Clear out solib state. Otherwise the solib state of the previous |
b9db4ced | 1917 | inferior might have survived and is entirely wrong for the new |
c378eb4e | 1918 | target. This has been observed on GNU/Linux using glibc 2.3. How |
b9db4ced UW |
1919 | to reproduce: |
1920 | ||
1921 | bash$ ./foo& | |
1922 | [1] 4711 | |
1923 | bash$ ./foo& | |
1924 | [1] 4712 | |
1925 | bash$ gdb ./foo | |
1926 | [...] | |
1927 | (gdb) attach 4711 | |
1928 | (gdb) detach | |
1929 | (gdb) attach 4712 | |
1930 | Cannot access memory at address 0xdeadbeef | |
1931 | */ | |
b9db4ced | 1932 | |
50c71eaf PA |
1933 | /* In some OSs, the shared library list is the same/global/shared |
1934 | across inferiors. If code is shared between processes, so are | |
1935 | memory regions and features. */ | |
f5656ead | 1936 | if (!gdbarch_has_global_solist (target_gdbarch ())) |
50c71eaf PA |
1937 | { |
1938 | no_shared_libraries (NULL, from_tty); | |
1939 | ||
1940 | invalidate_target_mem_regions (); | |
424163ea | 1941 | |
50c71eaf PA |
1942 | target_clear_description (); |
1943 | } | |
8ffcbaaf | 1944 | |
e9756d52 PP |
1945 | /* attach_flag may be set if the previous process associated with |
1946 | the inferior was attached to. */ | |
1947 | current_inferior ()->attach_flag = 0; | |
1948 | ||
5d5658a1 PA |
1949 | current_inferior ()->highest_thread_num = 0; |
1950 | ||
8ffcbaaf | 1951 | agent_capability_invalidate (); |
fd79ecee DJ |
1952 | } |
1953 | ||
b8fa0bfa PA |
1954 | /* Callback for iterate_over_inferiors. Gets rid of the given |
1955 | inferior. */ | |
1956 | ||
1957 | static int | |
1958 | dispose_inferior (struct inferior *inf, void *args) | |
1959 | { | |
9d4a934c AB |
1960 | /* Not all killed inferiors can, or will ever be, removed from the |
1961 | inferior list. Killed inferiors clearly don't need to be killed | |
1962 | again, so, we're done. */ | |
1963 | if (inf->pid == 0) | |
1964 | return 0; | |
1965 | ||
00431a78 PA |
1966 | thread_info *thread = any_thread_of_inferior (inf); |
1967 | if (thread != NULL) | |
b8fa0bfa | 1968 | { |
00431a78 | 1969 | switch_to_thread (thread); |
b8fa0bfa PA |
1970 | |
1971 | /* Core inferiors actually should be detached, not killed. */ | |
1972 | if (target_has_execution) | |
1973 | target_kill (); | |
1974 | else | |
6e1e1966 | 1975 | target_detach (inf, 0); |
b8fa0bfa PA |
1976 | } |
1977 | ||
1978 | return 0; | |
1979 | } | |
1980 | ||
c906108c SS |
1981 | /* This is to be called by the open routine before it does |
1982 | anything. */ | |
1983 | ||
1984 | void | |
fba45db2 | 1985 | target_preopen (int from_tty) |
c906108c | 1986 | { |
c5aa993b | 1987 | dont_repeat (); |
c906108c | 1988 | |
b8fa0bfa | 1989 | if (have_inferiors ()) |
c5aa993b | 1990 | { |
adf40b2e | 1991 | if (!from_tty |
b8fa0bfa PA |
1992 | || !have_live_inferiors () |
1993 | || query (_("A program is being debugged already. Kill it? "))) | |
1994 | iterate_over_inferiors (dispose_inferior, NULL); | |
c906108c | 1995 | else |
8a3fe4f8 | 1996 | error (_("Program not killed.")); |
c906108c SS |
1997 | } |
1998 | ||
1999 | /* Calling target_kill may remove the target from the stack. But if | |
2000 | it doesn't (which seems like a win for UDI), remove it now. */ | |
87ab71f0 PA |
2001 | /* Leave the exec target, though. The user may be switching from a |
2002 | live process to a core of the same program. */ | |
460014f5 | 2003 | pop_all_targets_above (file_stratum); |
fd79ecee DJ |
2004 | |
2005 | target_pre_inferior (from_tty); | |
c906108c SS |
2006 | } |
2007 | ||
6bd6f3b6 | 2008 | /* See target.h. */ |
c906108c SS |
2009 | |
2010 | void | |
6e1e1966 | 2011 | target_detach (inferior *inf, int from_tty) |
c906108c | 2012 | { |
6e1e1966 SM |
2013 | /* As long as some to_detach implementations rely on the current_inferior |
2014 | (either directly, or indirectly, like through target_gdbarch or by | |
2015 | reading memory), INF needs to be the current inferior. When that | |
2016 | requirement will become no longer true, then we can remove this | |
2017 | assertion. */ | |
2018 | gdb_assert (inf == current_inferior ()); | |
2019 | ||
f5656ead | 2020 | if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
50c71eaf PA |
2021 | /* Don't remove global breakpoints here. They're removed on |
2022 | disconnection from the target. */ | |
2023 | ; | |
2024 | else | |
2025 | /* If we're in breakpoints-always-inserted mode, have to remove | |
00431a78 PA |
2026 | breakpoints before detaching. */ |
2027 | remove_breakpoints_inf (current_inferior ()); | |
74960c60 | 2028 | |
24291992 PA |
2029 | prepare_for_detach (); |
2030 | ||
8b88a78e | 2031 | current_top_target ()->detach (inf, from_tty); |
799efbe8 PW |
2032 | |
2033 | /* After we have detached, clear the register cache for this inferior. */ | |
2034 | ptid_t pid_ptid = ptid_t (inf->pid); | |
2035 | ||
2036 | registers_changed_ptid (pid_ptid); | |
2037 | ||
2038 | /* We have to ensure we have no frame cache left. Normally, | |
2039 | registers_changed_ptid (pid_ptid) calls reinit_frame_cache when | |
2040 | inferior_ptid matches pid_ptid, but in our case, it does not | |
2041 | call it, as inferior_ptid has been reset. */ | |
2042 | reinit_frame_cache (); | |
c906108c SS |
2043 | } |
2044 | ||
6ad8ae5c | 2045 | void |
fee354ee | 2046 | target_disconnect (const char *args, int from_tty) |
6ad8ae5c | 2047 | { |
50c71eaf PA |
2048 | /* If we're in breakpoints-always-inserted mode or if breakpoints |
2049 | are global across processes, we have to remove them before | |
2050 | disconnecting. */ | |
74960c60 VP |
2051 | remove_breakpoints (); |
2052 | ||
8b88a78e | 2053 | current_top_target ()->disconnect (args, from_tty); |
6ad8ae5c DJ |
2054 | } |
2055 | ||
f2b9e3df SDJ |
2056 | /* See target/target.h. */ |
2057 | ||
117de6a9 | 2058 | ptid_t |
47608cb1 | 2059 | target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
117de6a9 | 2060 | { |
8b88a78e | 2061 | return current_top_target ()->wait (ptid, status, options); |
117de6a9 PA |
2062 | } |
2063 | ||
0b333c5e PA |
2064 | /* See target.h. */ |
2065 | ||
2066 | ptid_t | |
2067 | default_target_wait (struct target_ops *ops, | |
2068 | ptid_t ptid, struct target_waitstatus *status, | |
2069 | int options) | |
2070 | { | |
2071 | status->kind = TARGET_WAITKIND_IGNORE; | |
2072 | return minus_one_ptid; | |
2073 | } | |
2074 | ||
7a114964 | 2075 | const char * |
117de6a9 PA |
2076 | target_pid_to_str (ptid_t ptid) |
2077 | { | |
8b88a78e | 2078 | return current_top_target ()->pid_to_str (ptid); |
117de6a9 PA |
2079 | } |
2080 | ||
73ede765 | 2081 | const char * |
4694da01 TT |
2082 | target_thread_name (struct thread_info *info) |
2083 | { | |
8b88a78e | 2084 | return current_top_target ()->thread_name (info); |
4694da01 TT |
2085 | } |
2086 | ||
e04ee09e KB |
2087 | struct thread_info * |
2088 | target_thread_handle_to_thread_info (const gdb_byte *thread_handle, | |
2089 | int handle_len, | |
2090 | struct inferior *inf) | |
2091 | { | |
8b88a78e | 2092 | return current_top_target ()->thread_handle_to_thread_info (thread_handle, |
f6ac5f3d | 2093 | handle_len, inf); |
e04ee09e KB |
2094 | } |
2095 | ||
e1ac3328 | 2096 | void |
2ea28649 | 2097 | target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
e1ac3328 | 2098 | { |
4e5d721f | 2099 | target_dcache_invalidate (); |
28439f5e | 2100 | |
8b88a78e | 2101 | current_top_target ()->resume (ptid, step, signal); |
28439f5e | 2102 | |
6b84065d | 2103 | registers_changed_ptid (ptid); |
251bde03 | 2104 | /* We only set the internal executing state here. The user/frontend |
f2ffa92b PA |
2105 | running state is set at a higher level. This also clears the |
2106 | thread's stop_pc as side effect. */ | |
6b84065d | 2107 | set_executing (ptid, 1); |
6b84065d | 2108 | clear_inline_frame_state (ptid); |
e1ac3328 | 2109 | } |
2455069d | 2110 | |
85ad3aaf PA |
2111 | /* If true, target_commit_resume is a nop. */ |
2112 | static int defer_target_commit_resume; | |
2113 | ||
2114 | /* See target.h. */ | |
2115 | ||
2116 | void | |
2117 | target_commit_resume (void) | |
2118 | { | |
85ad3aaf PA |
2119 | if (defer_target_commit_resume) |
2120 | return; | |
2121 | ||
8b88a78e | 2122 | current_top_target ()->commit_resume (); |
85ad3aaf PA |
2123 | } |
2124 | ||
2125 | /* See target.h. */ | |
2126 | ||
a9bc57b9 TT |
2127 | scoped_restore_tmpl<int> |
2128 | make_scoped_defer_target_commit_resume () | |
85ad3aaf | 2129 | { |
a9bc57b9 | 2130 | return make_scoped_restore (&defer_target_commit_resume, 1); |
85ad3aaf PA |
2131 | } |
2132 | ||
2455069d | 2133 | void |
adc6a863 | 2134 | target_pass_signals (gdb::array_view<const unsigned char> pass_signals) |
2455069d | 2135 | { |
adc6a863 | 2136 | current_top_target ()->pass_signals (pass_signals); |
2455069d UW |
2137 | } |
2138 | ||
9b224c5e | 2139 | void |
adc6a863 | 2140 | target_program_signals (gdb::array_view<const unsigned char> program_signals) |
9b224c5e | 2141 | { |
adc6a863 | 2142 | current_top_target ()->program_signals (program_signals); |
9b224c5e PA |
2143 | } |
2144 | ||
098dba18 TT |
2145 | static int |
2146 | default_follow_fork (struct target_ops *self, int follow_child, | |
2147 | int detach_fork) | |
2148 | { | |
2149 | /* Some target returned a fork event, but did not know how to follow it. */ | |
2150 | internal_error (__FILE__, __LINE__, | |
2151 | _("could not find a target to follow fork")); | |
2152 | } | |
2153 | ||
ee057212 DJ |
2154 | /* Look through the list of possible targets for a target that can |
2155 | follow forks. */ | |
2156 | ||
2157 | int | |
07107ca6 | 2158 | target_follow_fork (int follow_child, int detach_fork) |
ee057212 | 2159 | { |
8b88a78e | 2160 | return current_top_target ()->follow_fork (follow_child, detach_fork); |
ee057212 DJ |
2161 | } |
2162 | ||
94585166 DB |
2163 | /* Target wrapper for follow exec hook. */ |
2164 | ||
2165 | void | |
2166 | target_follow_exec (struct inferior *inf, char *execd_pathname) | |
2167 | { | |
8b88a78e | 2168 | current_top_target ()->follow_exec (inf, execd_pathname); |
94585166 DB |
2169 | } |
2170 | ||
8d657035 TT |
2171 | static void |
2172 | default_mourn_inferior (struct target_ops *self) | |
2173 | { | |
2174 | internal_error (__FILE__, __LINE__, | |
2175 | _("could not find a target to follow mourn inferior")); | |
2176 | } | |
2177 | ||
136d6dae | 2178 | void |
bc1e6c81 | 2179 | target_mourn_inferior (ptid_t ptid) |
136d6dae | 2180 | { |
d7e15655 | 2181 | gdb_assert (ptid == inferior_ptid); |
8b88a78e | 2182 | current_top_target ()->mourn_inferior (); |
136d6dae | 2183 | |
8d657035 TT |
2184 | /* We no longer need to keep handles on any of the object files. |
2185 | Make sure to release them to avoid unnecessarily locking any | |
2186 | of them while we're not actually debugging. */ | |
2187 | bfd_cache_close_all (); | |
136d6dae VP |
2188 | } |
2189 | ||
424163ea DJ |
2190 | /* Look for a target which can describe architectural features, starting |
2191 | from TARGET. If we find one, return its description. */ | |
2192 | ||
2193 | const struct target_desc * | |
2194 | target_read_description (struct target_ops *target) | |
2195 | { | |
f6ac5f3d | 2196 | return target->read_description (); |
424163ea DJ |
2197 | } |
2198 | ||
58a5184e | 2199 | /* This implements a basic search of memory, reading target memory and |
08388c79 DE |
2200 | performing the search here (as opposed to performing the search in on the |
2201 | target side with, for example, gdbserver). */ | |
2202 | ||
2203 | int | |
2204 | simple_search_memory (struct target_ops *ops, | |
2205 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2206 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2207 | CORE_ADDR *found_addrp) | |
2208 | { | |
2209 | /* NOTE: also defined in find.c testcase. */ | |
2210 | #define SEARCH_CHUNK_SIZE 16000 | |
2211 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; | |
2212 | /* Buffer to hold memory contents for searching. */ | |
08388c79 | 2213 | unsigned search_buf_size; |
08388c79 DE |
2214 | |
2215 | search_buf_size = chunk_size + pattern_len - 1; | |
2216 | ||
2217 | /* No point in trying to allocate a buffer larger than the search space. */ | |
2218 | if (search_space_len < search_buf_size) | |
2219 | search_buf_size = search_space_len; | |
2220 | ||
26fcd5d7 | 2221 | gdb::byte_vector search_buf (search_buf_size); |
08388c79 DE |
2222 | |
2223 | /* Prime the search buffer. */ | |
2224 | ||
2225 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 TT |
2226 | search_buf.data (), start_addr, search_buf_size) |
2227 | != search_buf_size) | |
08388c79 | 2228 | { |
b3dc46ff AB |
2229 | warning (_("Unable to access %s bytes of target " |
2230 | "memory at %s, halting search."), | |
2231 | pulongest (search_buf_size), hex_string (start_addr)); | |
08388c79 DE |
2232 | return -1; |
2233 | } | |
2234 | ||
2235 | /* Perform the search. | |
2236 | ||
2237 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. | |
2238 | When we've scanned N bytes we copy the trailing bytes to the start and | |
2239 | read in another N bytes. */ | |
2240 | ||
2241 | while (search_space_len >= pattern_len) | |
2242 | { | |
2243 | gdb_byte *found_ptr; | |
325fac50 PA |
2244 | unsigned nr_search_bytes |
2245 | = std::min (search_space_len, (ULONGEST) search_buf_size); | |
08388c79 | 2246 | |
26fcd5d7 | 2247 | found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
d7f3ff3e | 2248 | pattern, pattern_len); |
08388c79 DE |
2249 | |
2250 | if (found_ptr != NULL) | |
2251 | { | |
26fcd5d7 | 2252 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
5d502164 | 2253 | |
08388c79 | 2254 | *found_addrp = found_addr; |
08388c79 DE |
2255 | return 1; |
2256 | } | |
2257 | ||
2258 | /* Not found in this chunk, skip to next chunk. */ | |
2259 | ||
2260 | /* Don't let search_space_len wrap here, it's unsigned. */ | |
2261 | if (search_space_len >= chunk_size) | |
2262 | search_space_len -= chunk_size; | |
2263 | else | |
2264 | search_space_len = 0; | |
2265 | ||
2266 | if (search_space_len >= pattern_len) | |
2267 | { | |
2268 | unsigned keep_len = search_buf_size - chunk_size; | |
8a35fb51 | 2269 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
08388c79 DE |
2270 | int nr_to_read; |
2271 | ||
2272 | /* Copy the trailing part of the previous iteration to the front | |
2273 | of the buffer for the next iteration. */ | |
2274 | gdb_assert (keep_len == pattern_len - 1); | |
26fcd5d7 | 2275 | memcpy (&search_buf[0], &search_buf[chunk_size], keep_len); |
08388c79 | 2276 | |
325fac50 PA |
2277 | nr_to_read = std::min (search_space_len - keep_len, |
2278 | (ULONGEST) chunk_size); | |
08388c79 DE |
2279 | |
2280 | if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, | |
26fcd5d7 | 2281 | &search_buf[keep_len], read_addr, |
08388c79 DE |
2282 | nr_to_read) != nr_to_read) |
2283 | { | |
b3dc46ff | 2284 | warning (_("Unable to access %s bytes of target " |
9b20d036 | 2285 | "memory at %s, halting search."), |
b3dc46ff | 2286 | plongest (nr_to_read), |
08388c79 | 2287 | hex_string (read_addr)); |
08388c79 DE |
2288 | return -1; |
2289 | } | |
2290 | ||
2291 | start_addr += chunk_size; | |
2292 | } | |
2293 | } | |
2294 | ||
2295 | /* Not found. */ | |
2296 | ||
08388c79 DE |
2297 | return 0; |
2298 | } | |
2299 | ||
58a5184e TT |
2300 | /* Default implementation of memory-searching. */ |
2301 | ||
2302 | static int | |
2303 | default_search_memory (struct target_ops *self, | |
2304 | CORE_ADDR start_addr, ULONGEST search_space_len, | |
2305 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2306 | CORE_ADDR *found_addrp) | |
2307 | { | |
2308 | /* Start over from the top of the target stack. */ | |
8b88a78e | 2309 | return simple_search_memory (current_top_target (), |
58a5184e TT |
2310 | start_addr, search_space_len, |
2311 | pattern, pattern_len, found_addrp); | |
2312 | } | |
2313 | ||
08388c79 DE |
2314 | /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
2315 | sequence of bytes in PATTERN with length PATTERN_LEN. | |
2316 | ||
2317 | The result is 1 if found, 0 if not found, and -1 if there was an error | |
2318 | requiring halting of the search (e.g. memory read error). | |
2319 | If the pattern is found the address is recorded in FOUND_ADDRP. */ | |
2320 | ||
2321 | int | |
2322 | target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, | |
2323 | const gdb_byte *pattern, ULONGEST pattern_len, | |
2324 | CORE_ADDR *found_addrp) | |
2325 | { | |
8b88a78e | 2326 | return current_top_target ()->search_memory (start_addr, search_space_len, |
f6ac5f3d | 2327 | pattern, pattern_len, found_addrp); |
08388c79 DE |
2328 | } |
2329 | ||
8edfe269 DJ |
2330 | /* Look through the currently pushed targets. If none of them will |
2331 | be able to restart the currently running process, issue an error | |
2332 | message. */ | |
2333 | ||
2334 | void | |
2335 | target_require_runnable (void) | |
2336 | { | |
b6a8c27b | 2337 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
8edfe269 DJ |
2338 | { |
2339 | /* If this target knows how to create a new program, then | |
2340 | assume we will still be able to after killing the current | |
2341 | one. Either killing and mourning will not pop T, or else | |
2342 | find_default_run_target will find it again. */ | |
f6ac5f3d | 2343 | if (t->can_create_inferior ()) |
8edfe269 DJ |
2344 | return; |
2345 | ||
548740d6 | 2346 | /* Do not worry about targets at certain strata that can not |
8edfe269 DJ |
2347 | create inferiors. Assume they will be pushed again if |
2348 | necessary, and continue to the process_stratum. */ | |
66b4deae | 2349 | if (t->stratum () > process_stratum) |
8edfe269 DJ |
2350 | continue; |
2351 | ||
3e43a32a MS |
2352 | error (_("The \"%s\" target does not support \"run\". " |
2353 | "Try \"help target\" or \"continue\"."), | |
f6ac5f3d | 2354 | t->shortname ()); |
8edfe269 DJ |
2355 | } |
2356 | ||
2357 | /* This function is only called if the target is running. In that | |
2358 | case there should have been a process_stratum target and it | |
c378eb4e | 2359 | should either know how to create inferiors, or not... */ |
9b20d036 | 2360 | internal_error (__FILE__, __LINE__, _("No targets found")); |
8edfe269 DJ |
2361 | } |
2362 | ||
6a3cb8e8 PA |
2363 | /* Whether GDB is allowed to fall back to the default run target for |
2364 | "run", "attach", etc. when no target is connected yet. */ | |
2365 | static int auto_connect_native_target = 1; | |
2366 | ||
2367 | static void | |
2368 | show_auto_connect_native_target (struct ui_file *file, int from_tty, | |
2369 | struct cmd_list_element *c, const char *value) | |
2370 | { | |
2371 | fprintf_filtered (file, | |
2372 | _("Whether GDB may automatically connect to the " | |
2373 | "native target is %s.\n"), | |
2374 | value); | |
2375 | } | |
2376 | ||
d9f719f1 PA |
2377 | /* A pointer to the target that can respond to "run" or "attach". |
2378 | Native targets are always singletons and instantiated early at GDB | |
2379 | startup. */ | |
2380 | static target_ops *the_native_target; | |
2381 | ||
2382 | /* See target.h. */ | |
2383 | ||
2384 | void | |
2385 | set_native_target (target_ops *target) | |
2386 | { | |
2387 | if (the_native_target != NULL) | |
2388 | internal_error (__FILE__, __LINE__, | |
2389 | _("native target already set (\"%s\")."), | |
2390 | the_native_target->longname ()); | |
2391 | ||
2392 | the_native_target = target; | |
2393 | } | |
2394 | ||
2395 | /* See target.h. */ | |
2396 | ||
2397 | target_ops * | |
2398 | get_native_target () | |
2399 | { | |
2400 | return the_native_target; | |
2401 | } | |
2402 | ||
c906108c SS |
2403 | /* Look through the list of possible targets for a target that can |
2404 | execute a run or attach command without any other data. This is | |
2405 | used to locate the default process stratum. | |
2406 | ||
5f667f2d PA |
2407 | If DO_MESG is not NULL, the result is always valid (error() is |
2408 | called for errors); else, return NULL on error. */ | |
c906108c SS |
2409 | |
2410 | static struct target_ops * | |
a121b7c1 | 2411 | find_default_run_target (const char *do_mesg) |
c906108c | 2412 | { |
d9f719f1 PA |
2413 | if (auto_connect_native_target && the_native_target != NULL) |
2414 | return the_native_target; | |
c906108c | 2415 | |
d9f719f1 PA |
2416 | if (do_mesg != NULL) |
2417 | error (_("Don't know how to %s. Try \"help target\"."), do_mesg); | |
2418 | return NULL; | |
c906108c SS |
2419 | } |
2420 | ||
b3ccfe11 | 2421 | /* See target.h. */ |
c906108c | 2422 | |
b3ccfe11 TT |
2423 | struct target_ops * |
2424 | find_attach_target (void) | |
c906108c | 2425 | { |
b3ccfe11 | 2426 | /* If a target on the current stack can attach, use it. */ |
b6a8c27b | 2427 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2428 | { |
f6ac5f3d | 2429 | if (t->can_attach ()) |
d9f719f1 | 2430 | return t; |
b3ccfe11 | 2431 | } |
c906108c | 2432 | |
b3ccfe11 | 2433 | /* Otherwise, use the default run target for attaching. */ |
d9f719f1 | 2434 | return find_default_run_target ("attach"); |
b84876c2 PA |
2435 | } |
2436 | ||
b3ccfe11 | 2437 | /* See target.h. */ |
b84876c2 | 2438 | |
b3ccfe11 TT |
2439 | struct target_ops * |
2440 | find_run_target (void) | |
9908b566 | 2441 | { |
f6ac5f3d | 2442 | /* If a target on the current stack can run, use it. */ |
b6a8c27b | 2443 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
b3ccfe11 | 2444 | { |
f6ac5f3d | 2445 | if (t->can_create_inferior ()) |
d9f719f1 | 2446 | return t; |
b3ccfe11 | 2447 | } |
5d502164 | 2448 | |
b3ccfe11 | 2449 | /* Otherwise, use the default run target. */ |
d9f719f1 | 2450 | return find_default_run_target ("run"); |
9908b566 VP |
2451 | } |
2452 | ||
f6ac5f3d PA |
2453 | bool |
2454 | target_ops::info_proc (const char *args, enum info_proc_what what) | |
2455 | { | |
2456 | return false; | |
2457 | } | |
2458 | ||
145b16a9 UW |
2459 | /* Implement the "info proc" command. */ |
2460 | ||
451b7c33 | 2461 | int |
7bc112c1 | 2462 | target_info_proc (const char *args, enum info_proc_what what) |
145b16a9 UW |
2463 | { |
2464 | struct target_ops *t; | |
2465 | ||
2466 | /* If we're already connected to something that can get us OS | |
2467 | related data, use it. Otherwise, try using the native | |
2468 | target. */ | |
f6ac5f3d PA |
2469 | t = find_target_at (process_stratum); |
2470 | if (t == NULL) | |
145b16a9 UW |
2471 | t = find_default_run_target (NULL); |
2472 | ||
b6a8c27b | 2473 | for (; t != NULL; t = t->beneath ()) |
145b16a9 | 2474 | { |
f6ac5f3d | 2475 | if (t->info_proc (args, what)) |
145b16a9 | 2476 | { |
145b16a9 UW |
2477 | if (targetdebug) |
2478 | fprintf_unfiltered (gdb_stdlog, | |
2479 | "target_info_proc (\"%s\", %d)\n", args, what); | |
2480 | ||
451b7c33 | 2481 | return 1; |
145b16a9 UW |
2482 | } |
2483 | } | |
2484 | ||
451b7c33 | 2485 | return 0; |
145b16a9 UW |
2486 | } |
2487 | ||
03583c20 | 2488 | static int |
2bfc0540 | 2489 | find_default_supports_disable_randomization (struct target_ops *self) |
03583c20 UW |
2490 | { |
2491 | struct target_ops *t; | |
2492 | ||
2493 | t = find_default_run_target (NULL); | |
f6ac5f3d PA |
2494 | if (t != NULL) |
2495 | return t->supports_disable_randomization (); | |
03583c20 UW |
2496 | return 0; |
2497 | } | |
2498 | ||
2499 | int | |
2500 | target_supports_disable_randomization (void) | |
2501 | { | |
8b88a78e | 2502 | return current_top_target ()->supports_disable_randomization (); |
03583c20 | 2503 | } |
9908b566 | 2504 | |
1fb77080 SDJ |
2505 | /* See target/target.h. */ |
2506 | ||
2507 | int | |
2508 | target_supports_multi_process (void) | |
2509 | { | |
8b88a78e | 2510 | return current_top_target ()->supports_multi_process (); |
1fb77080 SDJ |
2511 | } |
2512 | ||
b7b030ad TT |
2513 | /* See target.h. */ |
2514 | ||
9018be22 | 2515 | gdb::optional<gdb::char_vector> |
07e059b5 VP |
2516 | target_get_osdata (const char *type) |
2517 | { | |
07e059b5 VP |
2518 | struct target_ops *t; |
2519 | ||
739ef7fb PA |
2520 | /* If we're already connected to something that can get us OS |
2521 | related data, use it. Otherwise, try using the native | |
2522 | target. */ | |
f6ac5f3d PA |
2523 | t = find_target_at (process_stratum); |
2524 | if (t == NULL) | |
739ef7fb | 2525 | t = find_default_run_target ("get OS data"); |
07e059b5 VP |
2526 | |
2527 | if (!t) | |
9018be22 | 2528 | return {}; |
07e059b5 | 2529 | |
6d097e65 | 2530 | return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
07e059b5 VP |
2531 | } |
2532 | ||
6c95b8df | 2533 | |
8eaff7cd TT |
2534 | /* Determine the current address space of thread PTID. */ |
2535 | ||
2536 | struct address_space * | |
2537 | target_thread_address_space (ptid_t ptid) | |
2538 | { | |
2539 | struct address_space *aspace; | |
2540 | ||
8b88a78e | 2541 | aspace = current_top_target ()->thread_address_space (ptid); |
8eaff7cd TT |
2542 | gdb_assert (aspace != NULL); |
2543 | ||
8eaff7cd TT |
2544 | return aspace; |
2545 | } | |
2546 | ||
b6a8c27b PA |
2547 | /* See target.h. */ |
2548 | ||
2549 | target_ops * | |
2550 | target_ops::beneath () const | |
2551 | { | |
a1740ee1 | 2552 | return g_target_stack.find_beneath (this); |
b6a8c27b PA |
2553 | } |
2554 | ||
f6ac5f3d PA |
2555 | void |
2556 | target_ops::close () | |
2557 | { | |
2558 | } | |
2559 | ||
2560 | bool | |
2561 | target_ops::can_attach () | |
2562 | { | |
2563 | return 0; | |
2564 | } | |
2565 | ||
2566 | void | |
2567 | target_ops::attach (const char *, int) | |
2568 | { | |
2569 | gdb_assert_not_reached ("target_ops::attach called"); | |
2570 | } | |
2571 | ||
2572 | bool | |
2573 | target_ops::can_create_inferior () | |
2574 | { | |
2575 | return 0; | |
2576 | } | |
2577 | ||
2578 | void | |
2579 | target_ops::create_inferior (const char *, const std::string &, | |
2580 | char **, int) | |
2581 | { | |
2582 | gdb_assert_not_reached ("target_ops::create_inferior called"); | |
2583 | } | |
2584 | ||
57810aa7 | 2585 | bool |
f6ac5f3d PA |
2586 | target_ops::can_run () |
2587 | { | |
57810aa7 | 2588 | return false; |
f6ac5f3d PA |
2589 | } |
2590 | ||
2591 | int | |
2592 | target_can_run () | |
2593 | { | |
b6a8c27b | 2594 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
f6ac5f3d PA |
2595 | { |
2596 | if (t->can_run ()) | |
2597 | return 1; | |
2598 | } | |
2599 | ||
2600 | return 0; | |
2601 | } | |
7313baad UW |
2602 | |
2603 | /* Target file operations. */ | |
2604 | ||
2605 | static struct target_ops * | |
2606 | default_fileio_target (void) | |
2607 | { | |
f6ac5f3d PA |
2608 | struct target_ops *t; |
2609 | ||
7313baad UW |
2610 | /* If we're already connected to something that can perform |
2611 | file I/O, use it. Otherwise, try using the native target. */ | |
f6ac5f3d PA |
2612 | t = find_target_at (process_stratum); |
2613 | if (t != NULL) | |
2614 | return t; | |
2615 | return find_default_run_target ("file I/O"); | |
7313baad UW |
2616 | } |
2617 | ||
1c4b552b GB |
2618 | /* File handle for target file operations. */ |
2619 | ||
5ff79300 | 2620 | struct fileio_fh_t |
1c4b552b | 2621 | { |
20db9c52 PA |
2622 | /* The target on which this file is open. NULL if the target is |
2623 | meanwhile closed while the handle is open. */ | |
5ff79300 | 2624 | target_ops *target; |
1c4b552b GB |
2625 | |
2626 | /* The file descriptor on the target. */ | |
5ff79300 | 2627 | int target_fd; |
1c4b552b | 2628 | |
5ff79300 PA |
2629 | /* Check whether this fileio_fh_t represents a closed file. */ |
2630 | bool is_closed () | |
2631 | { | |
2632 | return target_fd < 0; | |
2633 | } | |
2634 | }; | |
1c4b552b GB |
2635 | |
2636 | /* Vector of currently open file handles. The value returned by | |
2637 | target_fileio_open and passed as the FD argument to other | |
2638 | target_fileio_* functions is an index into this vector. This | |
2639 | vector's entries are never freed; instead, files are marked as | |
2640 | closed, and the handle becomes available for reuse. */ | |
5ff79300 | 2641 | static std::vector<fileio_fh_t> fileio_fhandles; |
1c4b552b GB |
2642 | |
2643 | /* Index into fileio_fhandles of the lowest handle that might be | |
2644 | closed. This permits handle reuse without searching the whole | |
2645 | list each time a new file is opened. */ | |
2646 | static int lowest_closed_fd; | |
2647 | ||
20db9c52 PA |
2648 | /* Invalidate the target associated with open handles that were open |
2649 | on target TARG, since we're about to close (and maybe destroy) the | |
2650 | target. The handles remain open from the client's perspective, but | |
2651 | trying to do anything with them other than closing them will fail | |
2652 | with EIO. */ | |
2653 | ||
2654 | static void | |
2655 | fileio_handles_invalidate_target (target_ops *targ) | |
2656 | { | |
2657 | for (fileio_fh_t &fh : fileio_fhandles) | |
2658 | if (fh.target == targ) | |
2659 | fh.target = NULL; | |
2660 | } | |
2661 | ||
1c4b552b GB |
2662 | /* Acquire a target fileio file descriptor. */ |
2663 | ||
2664 | static int | |
5ff79300 | 2665 | acquire_fileio_fd (target_ops *target, int target_fd) |
1c4b552b | 2666 | { |
1c4b552b | 2667 | /* Search for closed handles to reuse. */ |
5ff79300 PA |
2668 | for (; lowest_closed_fd < fileio_fhandles.size (); lowest_closed_fd++) |
2669 | { | |
2670 | fileio_fh_t &fh = fileio_fhandles[lowest_closed_fd]; | |
2671 | ||
2672 | if (fh.is_closed ()) | |
2673 | break; | |
2674 | } | |
1c4b552b GB |
2675 | |
2676 | /* Push a new handle if no closed handles were found. */ | |
5ff79300 PA |
2677 | if (lowest_closed_fd == fileio_fhandles.size ()) |
2678 | fileio_fhandles.push_back (fileio_fh_t {target, target_fd}); | |
2679 | else | |
2680 | fileio_fhandles[lowest_closed_fd] = {target, target_fd}; | |
1c4b552b | 2681 | |
5ff79300 PA |
2682 | /* Should no longer be marked closed. */ |
2683 | gdb_assert (!fileio_fhandles[lowest_closed_fd].is_closed ()); | |
1c4b552b GB |
2684 | |
2685 | /* Return its index, and start the next lookup at | |
2686 | the next index. */ | |
2687 | return lowest_closed_fd++; | |
2688 | } | |
2689 | ||
2690 | /* Release a target fileio file descriptor. */ | |
2691 | ||
2692 | static void | |
2693 | release_fileio_fd (int fd, fileio_fh_t *fh) | |
2694 | { | |
5ff79300 | 2695 | fh->target_fd = -1; |
325fac50 | 2696 | lowest_closed_fd = std::min (lowest_closed_fd, fd); |
1c4b552b GB |
2697 | } |
2698 | ||
2699 | /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ | |
2700 | ||
5ff79300 PA |
2701 | static fileio_fh_t * |
2702 | fileio_fd_to_fh (int fd) | |
2703 | { | |
2704 | return &fileio_fhandles[fd]; | |
2705 | } | |
1c4b552b | 2706 | |
f6ac5f3d PA |
2707 | |
2708 | /* Default implementations of file i/o methods. We don't want these | |
2709 | to delegate automatically, because we need to know which target | |
2710 | supported the method, in order to call it directly from within | |
2711 | pread/pwrite, etc. */ | |
2712 | ||
2713 | int | |
2714 | target_ops::fileio_open (struct inferior *inf, const char *filename, | |
2715 | int flags, int mode, int warn_if_slow, | |
2716 | int *target_errno) | |
2717 | { | |
2718 | *target_errno = FILEIO_ENOSYS; | |
2719 | return -1; | |
2720 | } | |
2721 | ||
2722 | int | |
2723 | target_ops::fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2724 | ULONGEST offset, int *target_errno) | |
2725 | { | |
2726 | *target_errno = FILEIO_ENOSYS; | |
2727 | return -1; | |
2728 | } | |
2729 | ||
2730 | int | |
2731 | target_ops::fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2732 | ULONGEST offset, int *target_errno) | |
2733 | { | |
2734 | *target_errno = FILEIO_ENOSYS; | |
2735 | return -1; | |
2736 | } | |
2737 | ||
2738 | int | |
2739 | target_ops::fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2740 | { | |
2741 | *target_errno = FILEIO_ENOSYS; | |
2742 | return -1; | |
2743 | } | |
2744 | ||
2745 | int | |
2746 | target_ops::fileio_close (int fd, int *target_errno) | |
2747 | { | |
2748 | *target_errno = FILEIO_ENOSYS; | |
2749 | return -1; | |
2750 | } | |
2751 | ||
2752 | int | |
2753 | target_ops::fileio_unlink (struct inferior *inf, const char *filename, | |
2754 | int *target_errno) | |
2755 | { | |
2756 | *target_errno = FILEIO_ENOSYS; | |
2757 | return -1; | |
2758 | } | |
2759 | ||
2760 | gdb::optional<std::string> | |
2761 | target_ops::fileio_readlink (struct inferior *inf, const char *filename, | |
2762 | int *target_errno) | |
2763 | { | |
2764 | *target_errno = FILEIO_ENOSYS; | |
2765 | return {}; | |
2766 | } | |
2767 | ||
4313b8c0 GB |
2768 | /* Helper for target_fileio_open and |
2769 | target_fileio_open_warn_if_slow. */ | |
12e2a5fd | 2770 | |
4313b8c0 GB |
2771 | static int |
2772 | target_fileio_open_1 (struct inferior *inf, const char *filename, | |
2773 | int flags, int mode, int warn_if_slow, | |
2774 | int *target_errno) | |
7313baad | 2775 | { |
b6a8c27b | 2776 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2777 | { |
f6ac5f3d PA |
2778 | int fd = t->fileio_open (inf, filename, flags, mode, |
2779 | warn_if_slow, target_errno); | |
7313baad | 2780 | |
f6ac5f3d PA |
2781 | if (fd == -1 && *target_errno == FILEIO_ENOSYS) |
2782 | continue; | |
1c4b552b | 2783 | |
f6ac5f3d PA |
2784 | if (fd < 0) |
2785 | fd = -1; | |
2786 | else | |
2787 | fd = acquire_fileio_fd (t, fd); | |
2788 | ||
2789 | if (targetdebug) | |
2790 | fprintf_unfiltered (gdb_stdlog, | |
4313b8c0 | 2791 | "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
07c138c8 GB |
2792 | " = %d (%d)\n", |
2793 | inf == NULL ? 0 : inf->num, | |
7313baad | 2794 | filename, flags, mode, |
4313b8c0 GB |
2795 | warn_if_slow, fd, |
2796 | fd != -1 ? 0 : *target_errno); | |
f6ac5f3d | 2797 | return fd; |
7313baad UW |
2798 | } |
2799 | ||
2800 | *target_errno = FILEIO_ENOSYS; | |
2801 | return -1; | |
2802 | } | |
2803 | ||
12e2a5fd GB |
2804 | /* See target.h. */ |
2805 | ||
4313b8c0 GB |
2806 | int |
2807 | target_fileio_open (struct inferior *inf, const char *filename, | |
2808 | int flags, int mode, int *target_errno) | |
2809 | { | |
2810 | return target_fileio_open_1 (inf, filename, flags, mode, 0, | |
2811 | target_errno); | |
2812 | } | |
2813 | ||
2814 | /* See target.h. */ | |
2815 | ||
2816 | int | |
2817 | target_fileio_open_warn_if_slow (struct inferior *inf, | |
2818 | const char *filename, | |
2819 | int flags, int mode, int *target_errno) | |
2820 | { | |
2821 | return target_fileio_open_1 (inf, filename, flags, mode, 1, | |
2822 | target_errno); | |
2823 | } | |
2824 | ||
2825 | /* See target.h. */ | |
2826 | ||
7313baad UW |
2827 | int |
2828 | target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, | |
2829 | ULONGEST offset, int *target_errno) | |
2830 | { | |
1c4b552b GB |
2831 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2832 | int ret = -1; | |
7313baad | 2833 | |
5ff79300 | 2834 | if (fh->is_closed ()) |
1c4b552b | 2835 | *target_errno = EBADF; |
20db9c52 PA |
2836 | else if (fh->target == NULL) |
2837 | *target_errno = EIO; | |
1c4b552b | 2838 | else |
f6ac5f3d PA |
2839 | ret = fh->target->fileio_pwrite (fh->target_fd, write_buf, |
2840 | len, offset, target_errno); | |
7313baad | 2841 | |
1c4b552b GB |
2842 | if (targetdebug) |
2843 | fprintf_unfiltered (gdb_stdlog, | |
2844 | "target_fileio_pwrite (%d,...,%d,%s) " | |
2845 | "= %d (%d)\n", | |
2846 | fd, len, pulongest (offset), | |
2847 | ret, ret != -1 ? 0 : *target_errno); | |
2848 | return ret; | |
7313baad UW |
2849 | } |
2850 | ||
12e2a5fd GB |
2851 | /* See target.h. */ |
2852 | ||
7313baad UW |
2853 | int |
2854 | target_fileio_pread (int fd, gdb_byte *read_buf, int len, | |
2855 | ULONGEST offset, int *target_errno) | |
2856 | { | |
1c4b552b GB |
2857 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2858 | int ret = -1; | |
7313baad | 2859 | |
5ff79300 | 2860 | if (fh->is_closed ()) |
1c4b552b | 2861 | *target_errno = EBADF; |
20db9c52 PA |
2862 | else if (fh->target == NULL) |
2863 | *target_errno = EIO; | |
1c4b552b | 2864 | else |
f6ac5f3d PA |
2865 | ret = fh->target->fileio_pread (fh->target_fd, read_buf, |
2866 | len, offset, target_errno); | |
7313baad | 2867 | |
1c4b552b GB |
2868 | if (targetdebug) |
2869 | fprintf_unfiltered (gdb_stdlog, | |
2870 | "target_fileio_pread (%d,...,%d,%s) " | |
2871 | "= %d (%d)\n", | |
2872 | fd, len, pulongest (offset), | |
2873 | ret, ret != -1 ? 0 : *target_errno); | |
9b15c1f0 GB |
2874 | return ret; |
2875 | } | |
2876 | ||
2877 | /* See target.h. */ | |
12e2a5fd | 2878 | |
9b15c1f0 GB |
2879 | int |
2880 | target_fileio_fstat (int fd, struct stat *sb, int *target_errno) | |
2881 | { | |
2882 | fileio_fh_t *fh = fileio_fd_to_fh (fd); | |
2883 | int ret = -1; | |
2884 | ||
5ff79300 | 2885 | if (fh->is_closed ()) |
9b15c1f0 | 2886 | *target_errno = EBADF; |
20db9c52 PA |
2887 | else if (fh->target == NULL) |
2888 | *target_errno = EIO; | |
9b15c1f0 | 2889 | else |
f6ac5f3d | 2890 | ret = fh->target->fileio_fstat (fh->target_fd, sb, target_errno); |
9b15c1f0 GB |
2891 | |
2892 | if (targetdebug) | |
2893 | fprintf_unfiltered (gdb_stdlog, | |
2894 | "target_fileio_fstat (%d) = %d (%d)\n", | |
2895 | fd, ret, ret != -1 ? 0 : *target_errno); | |
1c4b552b | 2896 | return ret; |
7313baad UW |
2897 | } |
2898 | ||
12e2a5fd GB |
2899 | /* See target.h. */ |
2900 | ||
7313baad UW |
2901 | int |
2902 | target_fileio_close (int fd, int *target_errno) | |
2903 | { | |
1c4b552b GB |
2904 | fileio_fh_t *fh = fileio_fd_to_fh (fd); |
2905 | int ret = -1; | |
7313baad | 2906 | |
5ff79300 | 2907 | if (fh->is_closed ()) |
1c4b552b GB |
2908 | *target_errno = EBADF; |
2909 | else | |
7313baad | 2910 | { |
20db9c52 | 2911 | if (fh->target != NULL) |
f6ac5f3d PA |
2912 | ret = fh->target->fileio_close (fh->target_fd, |
2913 | target_errno); | |
20db9c52 PA |
2914 | else |
2915 | ret = 0; | |
1c4b552b | 2916 | release_fileio_fd (fd, fh); |
7313baad UW |
2917 | } |
2918 | ||
1c4b552b GB |
2919 | if (targetdebug) |
2920 | fprintf_unfiltered (gdb_stdlog, | |
2921 | "target_fileio_close (%d) = %d (%d)\n", | |
2922 | fd, ret, ret != -1 ? 0 : *target_errno); | |
2923 | return ret; | |
7313baad UW |
2924 | } |
2925 | ||
12e2a5fd GB |
2926 | /* See target.h. */ |
2927 | ||
7313baad | 2928 | int |
07c138c8 GB |
2929 | target_fileio_unlink (struct inferior *inf, const char *filename, |
2930 | int *target_errno) | |
7313baad | 2931 | { |
b6a8c27b | 2932 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
7313baad | 2933 | { |
f6ac5f3d | 2934 | int ret = t->fileio_unlink (inf, filename, target_errno); |
7313baad | 2935 | |
f6ac5f3d PA |
2936 | if (ret == -1 && *target_errno == FILEIO_ENOSYS) |
2937 | continue; | |
2938 | ||
2939 | if (targetdebug) | |
2940 | fprintf_unfiltered (gdb_stdlog, | |
2941 | "target_fileio_unlink (%d,%s)" | |
2942 | " = %d (%d)\n", | |
2943 | inf == NULL ? 0 : inf->num, filename, | |
2944 | ret, ret != -1 ? 0 : *target_errno); | |
2945 | return ret; | |
7313baad UW |
2946 | } |
2947 | ||
2948 | *target_errno = FILEIO_ENOSYS; | |
2949 | return -1; | |
2950 | } | |
2951 | ||
12e2a5fd GB |
2952 | /* See target.h. */ |
2953 | ||
e0d3522b | 2954 | gdb::optional<std::string> |
07c138c8 GB |
2955 | target_fileio_readlink (struct inferior *inf, const char *filename, |
2956 | int *target_errno) | |
b9e7b9c3 | 2957 | { |
b6a8c27b | 2958 | for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
b9e7b9c3 | 2959 | { |
f6ac5f3d PA |
2960 | gdb::optional<std::string> ret |
2961 | = t->fileio_readlink (inf, filename, target_errno); | |
b9e7b9c3 | 2962 | |
f6ac5f3d PA |
2963 | if (!ret.has_value () && *target_errno == FILEIO_ENOSYS) |
2964 | continue; | |
2965 | ||
2966 | if (targetdebug) | |
2967 | fprintf_unfiltered (gdb_stdlog, | |
2968 | "target_fileio_readlink (%d,%s)" | |
2969 | " = %s (%d)\n", | |
2970 | inf == NULL ? 0 : inf->num, | |
2971 | filename, ret ? ret->c_str () : "(nil)", | |
2972 | ret ? 0 : *target_errno); | |
2973 | return ret; | |
b9e7b9c3 UW |
2974 | } |
2975 | ||
2976 | *target_errno = FILEIO_ENOSYS; | |
e0d3522b | 2977 | return {}; |
b9e7b9c3 UW |
2978 | } |
2979 | ||
770623f7 TT |
2980 | /* Like scoped_fd, but specific to target fileio. */ |
2981 | ||
2982 | class scoped_target_fd | |
7313baad | 2983 | { |
770623f7 TT |
2984 | public: |
2985 | explicit scoped_target_fd (int fd) noexcept | |
2986 | : m_fd (fd) | |
2987 | { | |
2988 | } | |
7313baad | 2989 | |
770623f7 TT |
2990 | ~scoped_target_fd () |
2991 | { | |
2992 | if (m_fd >= 0) | |
2993 | { | |
2994 | int target_errno; | |
2995 | ||
2996 | target_fileio_close (m_fd, &target_errno); | |
2997 | } | |
2998 | } | |
2999 | ||
3000 | DISABLE_COPY_AND_ASSIGN (scoped_target_fd); | |
3001 | ||
3002 | int get () const noexcept | |
3003 | { | |
3004 | return m_fd; | |
3005 | } | |
3006 | ||
3007 | private: | |
3008 | int m_fd; | |
3009 | }; | |
7313baad | 3010 | |
07c138c8 GB |
3011 | /* Read target file FILENAME, in the filesystem as seen by INF. If |
3012 | INF is NULL, use the filesystem seen by the debugger (GDB or, for | |
3013 | remote targets, the remote stub). Store the result in *BUF_P and | |
3014 | return the size of the transferred data. PADDING additional bytes | |
3015 | are available in *BUF_P. This is a helper function for | |
3016 | target_fileio_read_alloc; see the declaration of that function for | |
3017 | more information. */ | |
7313baad | 3018 | |
f7af1fcd JK |
3019 | static LONGEST |
3020 | target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, | |
3021 | gdb_byte **buf_p, int padding) | |
3022 | { | |
db1ff28b JK |
3023 | size_t buf_alloc, buf_pos; |
3024 | gdb_byte *buf; | |
3025 | LONGEST n; | |
db1ff28b | 3026 | int target_errno; |
f7af1fcd | 3027 | |
770623f7 TT |
3028 | scoped_target_fd fd (target_fileio_open (inf, filename, FILEIO_O_RDONLY, |
3029 | 0700, &target_errno)); | |
3030 | if (fd.get () == -1) | |
f7af1fcd JK |
3031 | return -1; |
3032 | ||
db1ff28b JK |
3033 | /* Start by reading up to 4K at a time. The target will throttle |
3034 | this number down if necessary. */ | |
3035 | buf_alloc = 4096; | |
224c3ddb | 3036 | buf = (gdb_byte *) xmalloc (buf_alloc); |
db1ff28b JK |
3037 | buf_pos = 0; |
3038 | while (1) | |
3039 | { | |
770623f7 | 3040 | n = target_fileio_pread (fd.get (), &buf[buf_pos], |
db1ff28b JK |
3041 | buf_alloc - buf_pos - padding, buf_pos, |
3042 | &target_errno); | |
3043 | if (n < 0) | |
3044 | { | |
3045 | /* An error occurred. */ | |
db1ff28b JK |
3046 | xfree (buf); |
3047 | return -1; | |
3048 | } | |
3049 | else if (n == 0) | |
3050 | { | |
3051 | /* Read all there was. */ | |
db1ff28b JK |
3052 | if (buf_pos == 0) |
3053 | xfree (buf); | |
3054 | else | |
3055 | *buf_p = buf; | |
3056 | return buf_pos; | |
3057 | } | |
3058 | ||
3059 | buf_pos += n; | |
3060 | ||
3061 | /* If the buffer is filling up, expand it. */ | |
3062 | if (buf_alloc < buf_pos * 2) | |
3063 | { | |
3064 | buf_alloc *= 2; | |
224c3ddb | 3065 | buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
db1ff28b JK |
3066 | } |
3067 | ||
3068 | QUIT; | |
3069 | } | |
f7af1fcd JK |
3070 | } |
3071 | ||
12e2a5fd | 3072 | /* See target.h. */ |
7313baad UW |
3073 | |
3074 | LONGEST | |
07c138c8 GB |
3075 | target_fileio_read_alloc (struct inferior *inf, const char *filename, |
3076 | gdb_byte **buf_p) | |
7313baad | 3077 | { |
07c138c8 | 3078 | return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
7313baad UW |
3079 | } |
3080 | ||
db1ff28b | 3081 | /* See target.h. */ |
f7af1fcd | 3082 | |
87028b87 | 3083 | gdb::unique_xmalloc_ptr<char> |
f7af1fcd JK |
3084 | target_fileio_read_stralloc (struct inferior *inf, const char *filename) |
3085 | { | |
db1ff28b JK |
3086 | gdb_byte *buffer; |
3087 | char *bufstr; | |
3088 | LONGEST i, transferred; | |
3089 | ||
3090 | transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); | |
3091 | bufstr = (char *) buffer; | |
3092 | ||
3093 | if (transferred < 0) | |
87028b87 | 3094 | return gdb::unique_xmalloc_ptr<char> (nullptr); |
db1ff28b JK |
3095 | |
3096 | if (transferred == 0) | |
87028b87 | 3097 | return gdb::unique_xmalloc_ptr<char> (xstrdup ("")); |
db1ff28b JK |
3098 | |
3099 | bufstr[transferred] = 0; | |
3100 | ||
3101 | /* Check for embedded NUL bytes; but allow trailing NULs. */ | |
3102 | for (i = strlen (bufstr); i < transferred; i++) | |
3103 | if (bufstr[i] != 0) | |
3104 | { | |
3105 | warning (_("target file %s " | |
3106 | "contained unexpected null characters"), | |
3107 | filename); | |
3108 | break; | |
3109 | } | |
3110 | ||
87028b87 | 3111 | return gdb::unique_xmalloc_ptr<char> (bufstr); |
f7af1fcd | 3112 | } |
7313baad | 3113 | |
db1ff28b | 3114 | |
e0d24f8d | 3115 | static int |
31568a15 TT |
3116 | default_region_ok_for_hw_watchpoint (struct target_ops *self, |
3117 | CORE_ADDR addr, int len) | |
e0d24f8d | 3118 | { |
f5656ead | 3119 | return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
ccaa32c7 GS |
3120 | } |
3121 | ||
5009afc5 AS |
3122 | static int |
3123 | default_watchpoint_addr_within_range (struct target_ops *target, | |
3124 | CORE_ADDR addr, | |
3125 | CORE_ADDR start, int length) | |
3126 | { | |
3127 | return addr >= start && addr < start + length; | |
3128 | } | |
3129 | ||
8b06beed TT |
3130 | /* See target.h. */ |
3131 | ||
a1740ee1 PA |
3132 | target_ops * |
3133 | target_stack::find_beneath (const target_ops *t) const | |
8b06beed | 3134 | { |
a1740ee1 | 3135 | /* Look for a non-empty slot at stratum levels beneath T's. */ |
66b4deae | 3136 | for (int stratum = t->stratum () - 1; stratum >= 0; --stratum) |
a1740ee1 PA |
3137 | if (m_stack[stratum] != NULL) |
3138 | return m_stack[stratum]; | |
8b06beed TT |
3139 | |
3140 | return NULL; | |
3141 | } | |
3142 | ||
a1740ee1 PA |
3143 | /* See target.h. */ |
3144 | ||
3145 | struct target_ops * | |
3146 | find_target_at (enum strata stratum) | |
3147 | { | |
3148 | return g_target_stack.at (stratum); | |
3149 | } | |
3150 | ||
c906108c | 3151 | \f |
0f48b757 PA |
3152 | |
3153 | /* See target.h */ | |
3154 | ||
3155 | void | |
3156 | target_announce_detach (int from_tty) | |
3157 | { | |
3158 | pid_t pid; | |
a121b7c1 | 3159 | const char *exec_file; |
0f48b757 PA |
3160 | |
3161 | if (!from_tty) | |
3162 | return; | |
3163 | ||
3164 | exec_file = get_exec_file (0); | |
3165 | if (exec_file == NULL) | |
3166 | exec_file = ""; | |
3167 | ||
e99b03dc | 3168 | pid = inferior_ptid.pid (); |
0f48b757 | 3169 | printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
f2907e49 | 3170 | target_pid_to_str (ptid_t (pid))); |
0f48b757 PA |
3171 | gdb_flush (gdb_stdout); |
3172 | } | |
3173 | ||
c906108c SS |
3174 | /* The inferior process has died. Long live the inferior! */ |
3175 | ||
3176 | void | |
fba45db2 | 3177 | generic_mourn_inferior (void) |
c906108c | 3178 | { |
00431a78 | 3179 | inferior *inf = current_inferior (); |
c906108c | 3180 | |
39f77062 | 3181 | inferior_ptid = null_ptid; |
7f9f62ba | 3182 | |
f59f708a PA |
3183 | /* Mark breakpoints uninserted in case something tries to delete a |
3184 | breakpoint while we delete the inferior's threads (which would | |
3185 | fail, since the inferior is long gone). */ | |
3186 | mark_breakpoints_out (); | |
3187 | ||
00431a78 PA |
3188 | if (inf->pid != 0) |
3189 | exit_inferior (inf); | |
7f9f62ba | 3190 | |
f59f708a PA |
3191 | /* Note this wipes step-resume breakpoints, so needs to be done |
3192 | after exit_inferior, which ends up referencing the step-resume | |
3193 | breakpoints through clear_thread_inferior_resources. */ | |
c906108c | 3194 | breakpoint_init_inferior (inf_exited); |
f59f708a | 3195 | |
c906108c SS |
3196 | registers_changed (); |
3197 | ||
c906108c SS |
3198 | reopen_exec_file (); |
3199 | reinit_frame_cache (); | |
3200 | ||
9a4105ab AC |
3201 | if (deprecated_detach_hook) |
3202 | deprecated_detach_hook (); | |
c906108c SS |
3203 | } |
3204 | \f | |
fd0a2a6f MK |
3205 | /* Convert a normal process ID to a string. Returns the string in a |
3206 | static buffer. */ | |
c906108c | 3207 | |
7a114964 | 3208 | const char * |
39f77062 | 3209 | normal_pid_to_str (ptid_t ptid) |
c906108c | 3210 | { |
fd0a2a6f | 3211 | static char buf[32]; |
c906108c | 3212 | |
e99b03dc | 3213 | xsnprintf (buf, sizeof buf, "process %d", ptid.pid ()); |
c906108c SS |
3214 | return buf; |
3215 | } | |
3216 | ||
7a114964 | 3217 | static const char * |
770234d3 | 3218 | default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
117de6a9 PA |
3219 | { |
3220 | return normal_pid_to_str (ptid); | |
3221 | } | |
3222 | ||
9b4eba8e HZ |
3223 | /* Error-catcher for target_find_memory_regions. */ |
3224 | static int | |
2e73927c TT |
3225 | dummy_find_memory_regions (struct target_ops *self, |
3226 | find_memory_region_ftype ignore1, void *ignore2) | |
be4d1333 | 3227 | { |
9b4eba8e | 3228 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3229 | return 0; |
3230 | } | |
3231 | ||
9b4eba8e HZ |
3232 | /* Error-catcher for target_make_corefile_notes. */ |
3233 | static char * | |
fc6691b2 TT |
3234 | dummy_make_corefile_notes (struct target_ops *self, |
3235 | bfd *ignore1, int *ignore2) | |
be4d1333 | 3236 | { |
9b4eba8e | 3237 | error (_("Command not implemented for this target.")); |
be4d1333 MS |
3238 | return NULL; |
3239 | } | |
3240 | ||
f6ac5f3d PA |
3241 | #include "target-delegates.c" |
3242 | ||
c906108c | 3243 | |
d9f719f1 PA |
3244 | static const target_info dummy_target_info = { |
3245 | "None", | |
3246 | N_("None"), | |
3247 | "" | |
3248 | }; | |
3249 | ||
66b4deae PA |
3250 | strata |
3251 | dummy_target::stratum () const | |
f6ac5f3d | 3252 | { |
66b4deae | 3253 | return dummy_stratum; |
f6ac5f3d PA |
3254 | } |
3255 | ||
66b4deae PA |
3256 | strata |
3257 | debug_target::stratum () const | |
f6ac5f3d | 3258 | { |
66b4deae | 3259 | return debug_stratum; |
f6ac5f3d PA |
3260 | } |
3261 | ||
d9f719f1 PA |
3262 | const target_info & |
3263 | dummy_target::info () const | |
f6ac5f3d | 3264 | { |
d9f719f1 | 3265 | return dummy_target_info; |
f6ac5f3d PA |
3266 | } |
3267 | ||
d9f719f1 PA |
3268 | const target_info & |
3269 | debug_target::info () const | |
f6ac5f3d | 3270 | { |
b6a8c27b | 3271 | return beneath ()->info (); |
f6ac5f3d PA |
3272 | } |
3273 | ||
c906108c | 3274 | \f |
c906108c | 3275 | |
f1c07ab0 | 3276 | void |
460014f5 | 3277 | target_close (struct target_ops *targ) |
f1c07ab0 | 3278 | { |
7fdc1521 TT |
3279 | gdb_assert (!target_is_pushed (targ)); |
3280 | ||
20db9c52 PA |
3281 | fileio_handles_invalidate_target (targ); |
3282 | ||
f6ac5f3d | 3283 | targ->close (); |
947b8855 PA |
3284 | |
3285 | if (targetdebug) | |
460014f5 | 3286 | fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
f1c07ab0 AC |
3287 | } |
3288 | ||
28439f5e PA |
3289 | int |
3290 | target_thread_alive (ptid_t ptid) | |
c906108c | 3291 | { |
8b88a78e | 3292 | return current_top_target ()->thread_alive (ptid); |
28439f5e PA |
3293 | } |
3294 | ||
3295 | void | |
e8032dde | 3296 | target_update_thread_list (void) |
28439f5e | 3297 | { |
8b88a78e | 3298 | current_top_target ()->update_thread_list (); |
c906108c SS |
3299 | } |
3300 | ||
d914c394 SS |
3301 | void |
3302 | target_stop (ptid_t ptid) | |
3303 | { | |
3304 | if (!may_stop) | |
3305 | { | |
3306 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3307 | return; | |
3308 | } | |
3309 | ||
8b88a78e | 3310 | current_top_target ()->stop (ptid); |
d914c394 SS |
3311 | } |
3312 | ||
bfedc46a | 3313 | void |
e671cd59 | 3314 | target_interrupt () |
bfedc46a PA |
3315 | { |
3316 | if (!may_stop) | |
3317 | { | |
3318 | warning (_("May not interrupt or stop the target, ignoring attempt")); | |
3319 | return; | |
3320 | } | |
3321 | ||
8b88a78e | 3322 | current_top_target ()->interrupt (); |
bfedc46a PA |
3323 | } |
3324 | ||
abc56d60 PA |
3325 | /* See target.h. */ |
3326 | ||
93692b58 PA |
3327 | void |
3328 | target_pass_ctrlc (void) | |
3329 | { | |
8b88a78e | 3330 | current_top_target ()->pass_ctrlc (); |
93692b58 PA |
3331 | } |
3332 | ||
3333 | /* See target.h. */ | |
3334 | ||
3335 | void | |
3336 | default_target_pass_ctrlc (struct target_ops *ops) | |
3337 | { | |
e671cd59 | 3338 | target_interrupt (); |
93692b58 PA |
3339 | } |
3340 | ||
f8c1d06b GB |
3341 | /* See target/target.h. */ |
3342 | ||
3343 | void | |
03f4463b | 3344 | target_stop_and_wait (ptid_t ptid) |
f8c1d06b GB |
3345 | { |
3346 | struct target_waitstatus status; | |
3347 | int was_non_stop = non_stop; | |
3348 | ||
3349 | non_stop = 1; | |
3350 | target_stop (ptid); | |
3351 | ||
3352 | memset (&status, 0, sizeof (status)); | |
3353 | target_wait (ptid, &status, 0); | |
3354 | ||
3355 | non_stop = was_non_stop; | |
3356 | } | |
3357 | ||
3358 | /* See target/target.h. */ | |
3359 | ||
3360 | void | |
03f4463b | 3361 | target_continue_no_signal (ptid_t ptid) |
f8c1d06b GB |
3362 | { |
3363 | target_resume (ptid, 0, GDB_SIGNAL_0); | |
3364 | } | |
3365 | ||
049a8570 SDJ |
3366 | /* See target/target.h. */ |
3367 | ||
3368 | void | |
3369 | target_continue (ptid_t ptid, enum gdb_signal signal) | |
3370 | { | |
3371 | target_resume (ptid, 0, signal); | |
3372 | } | |
3373 | ||
fdbac7d8 | 3374 | /* Concatenate ELEM to LIST, a comma-separated list. */ |
09826ec5 | 3375 | |
09ce46f2 SM |
3376 | static void |
3377 | str_comma_list_concat_elem (std::string *list, const char *elem) | |
09826ec5 | 3378 | { |
09ce46f2 SM |
3379 | if (!list->empty ()) |
3380 | list->append (", "); | |
3381 | ||
3382 | list->append (elem); | |
09826ec5 PA |
3383 | } |
3384 | ||
3385 | /* Helper for target_options_to_string. If OPT is present in | |
3386 | TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. | |
09ce46f2 | 3387 | OPT is removed from TARGET_OPTIONS. */ |
09826ec5 | 3388 | |
09ce46f2 SM |
3389 | static void |
3390 | do_option (int *target_options, std::string *ret, | |
a121b7c1 | 3391 | int opt, const char *opt_str) |
09826ec5 PA |
3392 | { |
3393 | if ((*target_options & opt) != 0) | |
3394 | { | |
09ce46f2 | 3395 | str_comma_list_concat_elem (ret, opt_str); |
09826ec5 PA |
3396 | *target_options &= ~opt; |
3397 | } | |
09826ec5 PA |
3398 | } |
3399 | ||
fdbac7d8 SM |
3400 | /* See target.h. */ |
3401 | ||
09ce46f2 | 3402 | std::string |
09826ec5 PA |
3403 | target_options_to_string (int target_options) |
3404 | { | |
09ce46f2 | 3405 | std::string ret; |
09826ec5 PA |
3406 | |
3407 | #define DO_TARG_OPTION(OPT) \ | |
09ce46f2 | 3408 | do_option (&target_options, &ret, OPT, #OPT) |
09826ec5 PA |
3409 | |
3410 | DO_TARG_OPTION (TARGET_WNOHANG); | |
3411 | ||
3412 | if (target_options != 0) | |
09ce46f2 | 3413 | str_comma_list_concat_elem (&ret, "unknown???"); |
09826ec5 | 3414 | |
09826ec5 PA |
3415 | return ret; |
3416 | } | |
3417 | ||
28439f5e PA |
3418 | void |
3419 | target_fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 3420 | { |
8b88a78e | 3421 | current_top_target ()->fetch_registers (regcache, regno); |
ad5989bd | 3422 | if (targetdebug) |
ef79d9a3 | 3423 | regcache->debug_print_register ("target_fetch_registers", regno); |
c906108c SS |
3424 | } |
3425 | ||
28439f5e PA |
3426 | void |
3427 | target_store_registers (struct regcache *regcache, int regno) | |
c906108c | 3428 | { |
d914c394 SS |
3429 | if (!may_write_registers) |
3430 | error (_("Writing to registers is not allowed (regno %d)"), regno); | |
3431 | ||
8b88a78e | 3432 | current_top_target ()->store_registers (regcache, regno); |
6b84065d | 3433 | if (targetdebug) |
28439f5e | 3434 | { |
ef79d9a3 | 3435 | regcache->debug_print_register ("target_store_registers", regno); |
28439f5e | 3436 | } |
c906108c SS |
3437 | } |
3438 | ||
dc146f7c VP |
3439 | int |
3440 | target_core_of_thread (ptid_t ptid) | |
3441 | { | |
8b88a78e | 3442 | return current_top_target ()->core_of_thread (ptid); |
dc146f7c VP |
3443 | } |
3444 | ||
936d2992 PA |
3445 | int |
3446 | simple_verify_memory (struct target_ops *ops, | |
3447 | const gdb_byte *data, CORE_ADDR lma, ULONGEST size) | |
3448 | { | |
3449 | LONGEST total_xfered = 0; | |
3450 | ||
3451 | while (total_xfered < size) | |
3452 | { | |
3453 | ULONGEST xfered_len; | |
3454 | enum target_xfer_status status; | |
3455 | gdb_byte buf[1024]; | |
768adc05 | 3456 | ULONGEST howmuch = std::min<ULONGEST> (sizeof (buf), size - total_xfered); |
936d2992 PA |
3457 | |
3458 | status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, | |
3459 | buf, NULL, lma + total_xfered, howmuch, | |
3460 | &xfered_len); | |
3461 | if (status == TARGET_XFER_OK | |
3462 | && memcmp (data + total_xfered, buf, xfered_len) == 0) | |
3463 | { | |
3464 | total_xfered += xfered_len; | |
3465 | QUIT; | |
3466 | } | |
3467 | else | |
3468 | return 0; | |
3469 | } | |
3470 | return 1; | |
3471 | } | |
3472 | ||
3473 | /* Default implementation of memory verification. */ | |
3474 | ||
3475 | static int | |
3476 | default_verify_memory (struct target_ops *self, | |
3477 | const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3478 | { | |
3479 | /* Start over from the top of the target stack. */ | |
8b88a78e | 3480 | return simple_verify_memory (current_top_target (), |
936d2992 PA |
3481 | data, memaddr, size); |
3482 | } | |
3483 | ||
4a5e7a5b PA |
3484 | int |
3485 | target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) | |
3486 | { | |
8b88a78e | 3487 | return current_top_target ()->verify_memory (data, memaddr, size); |
4a5e7a5b PA |
3488 | } |
3489 | ||
9c06b0b4 TJB |
3490 | /* The documentation for this function is in its prototype declaration in |
3491 | target.h. */ | |
3492 | ||
3493 | int | |
f4b0a671 SM |
3494 | target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3495 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3496 | { |
8b88a78e | 3497 | return current_top_target ()->insert_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3498 | } |
3499 | ||
3500 | /* The documentation for this function is in its prototype declaration in | |
3501 | target.h. */ | |
3502 | ||
3503 | int | |
f4b0a671 SM |
3504 | target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
3505 | enum target_hw_bp_type rw) | |
9c06b0b4 | 3506 | { |
8b88a78e | 3507 | return current_top_target ()->remove_mask_watchpoint (addr, mask, rw); |
9c06b0b4 TJB |
3508 | } |
3509 | ||
3510 | /* The documentation for this function is in its prototype declaration | |
3511 | in target.h. */ | |
3512 | ||
3513 | int | |
3514 | target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) | |
3515 | { | |
8b88a78e | 3516 | return current_top_target ()->masked_watch_num_registers (addr, mask); |
9c06b0b4 TJB |
3517 | } |
3518 | ||
f1310107 TJB |
3519 | /* The documentation for this function is in its prototype declaration |
3520 | in target.h. */ | |
3521 | ||
3522 | int | |
3523 | target_ranged_break_num_registers (void) | |
3524 | { | |
8b88a78e | 3525 | return current_top_target ()->ranged_break_num_registers (); |
f1310107 TJB |
3526 | } |
3527 | ||
02d27625 MM |
3528 | /* See target.h. */ |
3529 | ||
02d27625 | 3530 | struct btrace_target_info * |
f4abbc16 | 3531 | target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
02d27625 | 3532 | { |
8b88a78e | 3533 | return current_top_target ()->enable_btrace (ptid, conf); |
02d27625 MM |
3534 | } |
3535 | ||
3536 | /* See target.h. */ | |
3537 | ||
3538 | void | |
3539 | target_disable_btrace (struct btrace_target_info *btinfo) | |
3540 | { | |
8b88a78e | 3541 | current_top_target ()->disable_btrace (btinfo); |
02d27625 MM |
3542 | } |
3543 | ||
3544 | /* See target.h. */ | |
3545 | ||
3546 | void | |
3547 | target_teardown_btrace (struct btrace_target_info *btinfo) | |
3548 | { | |
8b88a78e | 3549 | current_top_target ()->teardown_btrace (btinfo); |
02d27625 MM |
3550 | } |
3551 | ||
3552 | /* See target.h. */ | |
3553 | ||
969c39fb | 3554 | enum btrace_error |
734b0e4b | 3555 | target_read_btrace (struct btrace_data *btrace, |
969c39fb | 3556 | struct btrace_target_info *btinfo, |
02d27625 MM |
3557 | enum btrace_read_type type) |
3558 | { | |
8b88a78e | 3559 | return current_top_target ()->read_btrace (btrace, btinfo, type); |
02d27625 MM |
3560 | } |
3561 | ||
d02ed0bb MM |
3562 | /* See target.h. */ |
3563 | ||
f4abbc16 MM |
3564 | const struct btrace_config * |
3565 | target_btrace_conf (const struct btrace_target_info *btinfo) | |
3566 | { | |
8b88a78e | 3567 | return current_top_target ()->btrace_conf (btinfo); |
f4abbc16 MM |
3568 | } |
3569 | ||
3570 | /* See target.h. */ | |
3571 | ||
7c1687a9 MM |
3572 | void |
3573 | target_stop_recording (void) | |
3574 | { | |
8b88a78e | 3575 | current_top_target ()->stop_recording (); |
7c1687a9 MM |
3576 | } |
3577 | ||
3578 | /* See target.h. */ | |
3579 | ||
d02ed0bb | 3580 | void |
85e1311a | 3581 | target_save_record (const char *filename) |
d02ed0bb | 3582 | { |
8b88a78e | 3583 | current_top_target ()->save_record (filename); |
d02ed0bb MM |
3584 | } |
3585 | ||
3586 | /* See target.h. */ | |
3587 | ||
3588 | int | |
f6ac5f3d | 3589 | target_supports_delete_record () |
d02ed0bb | 3590 | { |
8b88a78e | 3591 | return current_top_target ()->supports_delete_record (); |
d02ed0bb MM |
3592 | } |
3593 | ||
3594 | /* See target.h. */ | |
3595 | ||
3596 | void | |
3597 | target_delete_record (void) | |
3598 | { | |
8b88a78e | 3599 | current_top_target ()->delete_record (); |
d02ed0bb MM |
3600 | } |
3601 | ||
3602 | /* See target.h. */ | |
3603 | ||
b158a20f TW |
3604 | enum record_method |
3605 | target_record_method (ptid_t ptid) | |
3606 | { | |
8b88a78e | 3607 | return current_top_target ()->record_method (ptid); |
b158a20f TW |
3608 | } |
3609 | ||
3610 | /* See target.h. */ | |
3611 | ||
d02ed0bb | 3612 | int |
a52eab48 | 3613 | target_record_is_replaying (ptid_t ptid) |
d02ed0bb | 3614 | { |
8b88a78e | 3615 | return current_top_target ()->record_is_replaying (ptid); |
d02ed0bb MM |
3616 | } |
3617 | ||
3618 | /* See target.h. */ | |
3619 | ||
7ff27e9b MM |
3620 | int |
3621 | target_record_will_replay (ptid_t ptid, int dir) | |
3622 | { | |
8b88a78e | 3623 | return current_top_target ()->record_will_replay (ptid, dir); |
7ff27e9b MM |
3624 | } |
3625 | ||
3626 | /* See target.h. */ | |
3627 | ||
797094dd MM |
3628 | void |
3629 | target_record_stop_replaying (void) | |
3630 | { | |
8b88a78e | 3631 | current_top_target ()->record_stop_replaying (); |
797094dd MM |
3632 | } |
3633 | ||
3634 | /* See target.h. */ | |
3635 | ||
d02ed0bb MM |
3636 | void |
3637 | target_goto_record_begin (void) | |
3638 | { | |
8b88a78e | 3639 | current_top_target ()->goto_record_begin (); |
d02ed0bb MM |
3640 | } |
3641 | ||
3642 | /* See target.h. */ | |
3643 | ||
3644 | void | |
3645 | target_goto_record_end (void) | |
3646 | { | |
8b88a78e | 3647 | current_top_target ()->goto_record_end (); |
d02ed0bb MM |
3648 | } |
3649 | ||
3650 | /* See target.h. */ | |
3651 | ||
3652 | void | |
3653 | target_goto_record (ULONGEST insn) | |
3654 | { | |
8b88a78e | 3655 | current_top_target ()->goto_record (insn); |
d02ed0bb MM |
3656 | } |
3657 | ||
67c86d06 MM |
3658 | /* See target.h. */ |
3659 | ||
3660 | void | |
9a24775b | 3661 | target_insn_history (int size, gdb_disassembly_flags flags) |
67c86d06 | 3662 | { |
8b88a78e | 3663 | current_top_target ()->insn_history (size, flags); |
67c86d06 MM |
3664 | } |
3665 | ||
3666 | /* See target.h. */ | |
3667 | ||
3668 | void | |
9a24775b PA |
3669 | target_insn_history_from (ULONGEST from, int size, |
3670 | gdb_disassembly_flags flags) | |
67c86d06 | 3671 | { |
8b88a78e | 3672 | current_top_target ()->insn_history_from (from, size, flags); |
67c86d06 MM |
3673 | } |
3674 | ||
3675 | /* See target.h. */ | |
3676 | ||
3677 | void | |
9a24775b PA |
3678 | target_insn_history_range (ULONGEST begin, ULONGEST end, |
3679 | gdb_disassembly_flags flags) | |
67c86d06 | 3680 | { |
8b88a78e | 3681 | current_top_target ()->insn_history_range (begin, end, flags); |
67c86d06 MM |
3682 | } |
3683 | ||
15984c13 MM |
3684 | /* See target.h. */ |
3685 | ||
3686 | void | |
0cb7c7b0 | 3687 | target_call_history (int size, record_print_flags flags) |
15984c13 | 3688 | { |
8b88a78e | 3689 | current_top_target ()->call_history (size, flags); |
15984c13 MM |
3690 | } |
3691 | ||
3692 | /* See target.h. */ | |
3693 | ||
3694 | void | |
0cb7c7b0 | 3695 | target_call_history_from (ULONGEST begin, int size, record_print_flags flags) |
15984c13 | 3696 | { |
8b88a78e | 3697 | current_top_target ()->call_history_from (begin, size, flags); |
15984c13 MM |
3698 | } |
3699 | ||
3700 | /* See target.h. */ | |
3701 | ||
3702 | void | |
0cb7c7b0 | 3703 | target_call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags) |
15984c13 | 3704 | { |
8b88a78e | 3705 | current_top_target ()->call_history_range (begin, end, flags); |
15984c13 MM |
3706 | } |
3707 | ||
ea001bdc MM |
3708 | /* See target.h. */ |
3709 | ||
3710 | const struct frame_unwind * | |
3711 | target_get_unwinder (void) | |
3712 | { | |
8b88a78e | 3713 | return current_top_target ()->get_unwinder (); |
ea001bdc MM |
3714 | } |
3715 | ||
3716 | /* See target.h. */ | |
3717 | ||
3718 | const struct frame_unwind * | |
3719 | target_get_tailcall_unwinder (void) | |
3720 | { | |
8b88a78e | 3721 | return current_top_target ()->get_tailcall_unwinder (); |
ea001bdc MM |
3722 | } |
3723 | ||
5fff78c4 MM |
3724 | /* See target.h. */ |
3725 | ||
3726 | void | |
3727 | target_prepare_to_generate_core (void) | |
3728 | { | |
8b88a78e | 3729 | current_top_target ()->prepare_to_generate_core (); |
5fff78c4 MM |
3730 | } |
3731 | ||
3732 | /* See target.h. */ | |
3733 | ||
3734 | void | |
3735 | target_done_generating_core (void) | |
3736 | { | |
8b88a78e | 3737 | current_top_target ()->done_generating_core (); |
5fff78c4 MM |
3738 | } |
3739 | ||
c906108c | 3740 | \f |
c5aa993b JM |
3741 | |
3742 | static char targ_desc[] = | |
3e43a32a MS |
3743 | "Names of targets and files being debugged.\nShows the entire \ |
3744 | stack of targets currently in use (including the exec-file,\n\ | |
c906108c SS |
3745 | core-file, and process, if any), as well as the symbol file name."; |
3746 | ||
a53f3625 | 3747 | static void |
a30bf1f1 TT |
3748 | default_rcmd (struct target_ops *self, const char *command, |
3749 | struct ui_file *output) | |
a53f3625 TT |
3750 | { |
3751 | error (_("\"monitor\" command not supported by this target.")); | |
3752 | } | |
3753 | ||
96baa820 | 3754 | static void |
0b39b52e | 3755 | do_monitor_command (const char *cmd, int from_tty) |
96baa820 | 3756 | { |
96baa820 JM |
3757 | target_rcmd (cmd, gdb_stdtarg); |
3758 | } | |
3759 | ||
78cbbba8 LM |
3760 | /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
3761 | ignored. */ | |
3762 | ||
3763 | void | |
0b39b52e | 3764 | flash_erase_command (const char *cmd, int from_tty) |
78cbbba8 LM |
3765 | { |
3766 | /* Used to communicate termination of flash operations to the target. */ | |
3767 | bool found_flash_region = false; | |
78cbbba8 LM |
3768 | struct gdbarch *gdbarch = target_gdbarch (); |
3769 | ||
a664f67e | 3770 | std::vector<mem_region> mem_regions = target_memory_map (); |
78cbbba8 LM |
3771 | |
3772 | /* Iterate over all memory regions. */ | |
a664f67e | 3773 | for (const mem_region &m : mem_regions) |
78cbbba8 | 3774 | { |
78cbbba8 | 3775 | /* Is this a flash memory region? */ |
a664f67e | 3776 | if (m.attrib.mode == MEM_FLASH) |
78cbbba8 LM |
3777 | { |
3778 | found_flash_region = true; | |
a664f67e | 3779 | target_flash_erase (m.lo, m.hi - m.lo); |
78cbbba8 | 3780 | |
76f9c9cf | 3781 | ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
78cbbba8 LM |
3782 | |
3783 | current_uiout->message (_("Erasing flash memory region at address ")); | |
a664f67e | 3784 | current_uiout->field_fmt ("address", "%s", paddress (gdbarch, m.lo)); |
78cbbba8 | 3785 | current_uiout->message (", size = "); |
a664f67e | 3786 | current_uiout->field_fmt ("size", "%s", hex_string (m.hi - m.lo)); |
78cbbba8 | 3787 | current_uiout->message ("\n"); |
78cbbba8 LM |
3788 | } |
3789 | } | |
3790 | ||
3791 | /* Did we do any flash operations? If so, we need to finalize them. */ | |
3792 | if (found_flash_region) | |
3793 | target_flash_done (); | |
3794 | else | |
3795 | current_uiout->message (_("No flash memory regions found.\n")); | |
3796 | } | |
3797 | ||
87680a14 JB |
3798 | /* Print the name of each layers of our target stack. */ |
3799 | ||
3800 | static void | |
d3cb6b99 | 3801 | maintenance_print_target_stack (const char *cmd, int from_tty) |
87680a14 | 3802 | { |
87680a14 JB |
3803 | printf_filtered (_("The current target stack is:\n")); |
3804 | ||
b6a8c27b | 3805 | for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
87680a14 | 3806 | { |
66b4deae | 3807 | if (t->stratum () == debug_stratum) |
f6ac5f3d PA |
3808 | continue; |
3809 | printf_filtered (" - %s (%s)\n", t->shortname (), t->longname ()); | |
87680a14 JB |
3810 | } |
3811 | } | |
3812 | ||
372316f1 PA |
3813 | /* See target.h. */ |
3814 | ||
3815 | void | |
3816 | target_async (int enable) | |
3817 | { | |
3818 | infrun_async (enable); | |
8b88a78e | 3819 | current_top_target ()->async (enable); |
372316f1 PA |
3820 | } |
3821 | ||
65706a29 PA |
3822 | /* See target.h. */ |
3823 | ||
3824 | void | |
3825 | target_thread_events (int enable) | |
3826 | { | |
8b88a78e | 3827 | current_top_target ()->thread_events (enable); |
65706a29 PA |
3828 | } |
3829 | ||
329ea579 PA |
3830 | /* Controls if targets can report that they can/are async. This is |
3831 | just for maintainers to use when debugging gdb. */ | |
3832 | int target_async_permitted = 1; | |
c6ebd6cf VP |
3833 | |
3834 | /* The set command writes to this variable. If the inferior is | |
b5419e49 | 3835 | executing, target_async_permitted is *not* updated. */ |
329ea579 | 3836 | static int target_async_permitted_1 = 1; |
c6ebd6cf VP |
3837 | |
3838 | static void | |
eb4c3f4a | 3839 | maint_set_target_async_command (const char *args, int from_tty, |
329ea579 | 3840 | struct cmd_list_element *c) |
c6ebd6cf | 3841 | { |
c35b1492 | 3842 | if (have_live_inferiors ()) |
c6ebd6cf VP |
3843 | { |
3844 | target_async_permitted_1 = target_async_permitted; | |
3845 | error (_("Cannot change this setting while the inferior is running.")); | |
3846 | } | |
3847 | ||
3848 | target_async_permitted = target_async_permitted_1; | |
3849 | } | |
3850 | ||
3851 | static void | |
329ea579 PA |
3852 | maint_show_target_async_command (struct ui_file *file, int from_tty, |
3853 | struct cmd_list_element *c, | |
3854 | const char *value) | |
c6ebd6cf | 3855 | { |
3e43a32a MS |
3856 | fprintf_filtered (file, |
3857 | _("Controlling the inferior in " | |
3858 | "asynchronous mode is %s.\n"), value); | |
c6ebd6cf VP |
3859 | } |
3860 | ||
fbea99ea PA |
3861 | /* Return true if the target operates in non-stop mode even with "set |
3862 | non-stop off". */ | |
3863 | ||
3864 | static int | |
3865 | target_always_non_stop_p (void) | |
3866 | { | |
8b88a78e | 3867 | return current_top_target ()->always_non_stop_p (); |
fbea99ea PA |
3868 | } |
3869 | ||
3870 | /* See target.h. */ | |
3871 | ||
3872 | int | |
3873 | target_is_non_stop_p (void) | |
3874 | { | |
3875 | return (non_stop | |
3876 | || target_non_stop_enabled == AUTO_BOOLEAN_TRUE | |
3877 | || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO | |
3878 | && target_always_non_stop_p ())); | |
3879 | } | |
3880 | ||
3881 | /* Controls if targets can report that they always run in non-stop | |
3882 | mode. This is just for maintainers to use when debugging gdb. */ | |
3883 | enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; | |
3884 | ||
3885 | /* The set command writes to this variable. If the inferior is | |
3886 | executing, target_non_stop_enabled is *not* updated. */ | |
3887 | static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; | |
3888 | ||
3889 | /* Implementation of "maint set target-non-stop". */ | |
3890 | ||
3891 | static void | |
eb4c3f4a | 3892 | maint_set_target_non_stop_command (const char *args, int from_tty, |
fbea99ea PA |
3893 | struct cmd_list_element *c) |
3894 | { | |
3895 | if (have_live_inferiors ()) | |
3896 | { | |
3897 | target_non_stop_enabled_1 = target_non_stop_enabled; | |
3898 | error (_("Cannot change this setting while the inferior is running.")); | |
3899 | } | |
3900 | ||
3901 | target_non_stop_enabled = target_non_stop_enabled_1; | |
3902 | } | |
3903 | ||
3904 | /* Implementation of "maint show target-non-stop". */ | |
3905 | ||
3906 | static void | |
3907 | maint_show_target_non_stop_command (struct ui_file *file, int from_tty, | |
3908 | struct cmd_list_element *c, | |
3909 | const char *value) | |
3910 | { | |
3911 | if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) | |
3912 | fprintf_filtered (file, | |
3913 | _("Whether the target is always in non-stop mode " | |
3914 | "is %s (currently %s).\n"), value, | |
3915 | target_always_non_stop_p () ? "on" : "off"); | |
3916 | else | |
3917 | fprintf_filtered (file, | |
3918 | _("Whether the target is always in non-stop mode " | |
3919 | "is %s.\n"), value); | |
3920 | } | |
3921 | ||
d914c394 SS |
3922 | /* Temporary copies of permission settings. */ |
3923 | ||
3924 | static int may_write_registers_1 = 1; | |
3925 | static int may_write_memory_1 = 1; | |
3926 | static int may_insert_breakpoints_1 = 1; | |
3927 | static int may_insert_tracepoints_1 = 1; | |
3928 | static int may_insert_fast_tracepoints_1 = 1; | |
3929 | static int may_stop_1 = 1; | |
3930 | ||
3931 | /* Make the user-set values match the real values again. */ | |
3932 | ||
3933 | void | |
3934 | update_target_permissions (void) | |
3935 | { | |
3936 | may_write_registers_1 = may_write_registers; | |
3937 | may_write_memory_1 = may_write_memory; | |
3938 | may_insert_breakpoints_1 = may_insert_breakpoints; | |
3939 | may_insert_tracepoints_1 = may_insert_tracepoints; | |
3940 | may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; | |
3941 | may_stop_1 = may_stop; | |
3942 | } | |
3943 | ||
3944 | /* The one function handles (most of) the permission flags in the same | |
3945 | way. */ | |
3946 | ||
3947 | static void | |
eb4c3f4a | 3948 | set_target_permissions (const char *args, int from_tty, |
d914c394 SS |
3949 | struct cmd_list_element *c) |
3950 | { | |
3951 | if (target_has_execution) | |
3952 | { | |
3953 | update_target_permissions (); | |
3954 | error (_("Cannot change this setting while the inferior is running.")); | |
3955 | } | |
3956 | ||
3957 | /* Make the real values match the user-changed values. */ | |
3958 | may_write_registers = may_write_registers_1; | |
3959 | may_insert_breakpoints = may_insert_breakpoints_1; | |
3960 | may_insert_tracepoints = may_insert_tracepoints_1; | |
3961 | may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; | |
3962 | may_stop = may_stop_1; | |
3963 | update_observer_mode (); | |
3964 | } | |
3965 | ||
3966 | /* Set memory write permission independently of observer mode. */ | |
3967 | ||
3968 | static void | |
eb4c3f4a | 3969 | set_write_memory_permission (const char *args, int from_tty, |
d914c394 SS |
3970 | struct cmd_list_element *c) |
3971 | { | |
3972 | /* Make the real values match the user-changed values. */ | |
3973 | may_write_memory = may_write_memory_1; | |
3974 | update_observer_mode (); | |
3975 | } | |
3976 | ||
c906108c | 3977 | void |
fba45db2 | 3978 | initialize_targets (void) |
c906108c | 3979 | { |
f6ac5f3d PA |
3980 | the_dummy_target = new dummy_target (); |
3981 | push_target (the_dummy_target); | |
3982 | ||
3983 | the_debug_target = new debug_target (); | |
c906108c | 3984 | |
11db9430 SM |
3985 | add_info ("target", info_target_command, targ_desc); |
3986 | add_info ("files", info_target_command, targ_desc); | |
c906108c | 3987 | |
ccce17b0 | 3988 | add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
85c07804 AC |
3989 | Set target debugging."), _("\ |
3990 | Show target debugging."), _("\ | |
333dabeb | 3991 | When non-zero, target debugging is enabled. Higher numbers are more\n\ |
3cecbbbe TT |
3992 | verbose."), |
3993 | set_targetdebug, | |
ccce17b0 YQ |
3994 | show_targetdebug, |
3995 | &setdebuglist, &showdebuglist); | |
3a11626d | 3996 | |
2bc416ba | 3997 | add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
7915a72c AC |
3998 | &trust_readonly, _("\ |
3999 | Set mode for reading from readonly sections."), _("\ | |
4000 | Show mode for reading from readonly sections."), _("\ | |
3a11626d MS |
4001 | When this mode is on, memory reads from readonly sections (such as .text)\n\ |
4002 | will be read from the object file instead of from the target. This will\n\ | |
7915a72c | 4003 | result in significant performance improvement for remote targets."), |
2c5b56ce | 4004 | NULL, |
920d2a44 | 4005 | show_trust_readonly, |
e707bbc2 | 4006 | &setlist, &showlist); |
96baa820 JM |
4007 | |
4008 | add_com ("monitor", class_obscure, do_monitor_command, | |
1bedd215 | 4009 | _("Send a command to the remote monitor (remote targets only).")); |
96baa820 | 4010 | |
87680a14 JB |
4011 | add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
4012 | _("Print the name of each layer of the internal target stack."), | |
4013 | &maintenanceprintlist); | |
4014 | ||
c6ebd6cf VP |
4015 | add_setshow_boolean_cmd ("target-async", no_class, |
4016 | &target_async_permitted_1, _("\ | |
4017 | Set whether gdb controls the inferior in asynchronous mode."), _("\ | |
4018 | Show whether gdb controls the inferior in asynchronous mode."), _("\ | |
4019 | Tells gdb whether to control the inferior in asynchronous mode."), | |
329ea579 PA |
4020 | maint_set_target_async_command, |
4021 | maint_show_target_async_command, | |
4022 | &maintenance_set_cmdlist, | |
4023 | &maintenance_show_cmdlist); | |
c6ebd6cf | 4024 | |
fbea99ea PA |
4025 | add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
4026 | &target_non_stop_enabled_1, _("\ | |
4027 | Set whether gdb always controls the inferior in non-stop mode."), _("\ | |
4028 | Show whether gdb always controls the inferior in non-stop mode."), _("\ | |
4029 | Tells gdb whether to control the inferior in non-stop mode."), | |
4030 | maint_set_target_non_stop_command, | |
4031 | maint_show_target_non_stop_command, | |
4032 | &maintenance_set_cmdlist, | |
4033 | &maintenance_show_cmdlist); | |
4034 | ||
d914c394 SS |
4035 | add_setshow_boolean_cmd ("may-write-registers", class_support, |
4036 | &may_write_registers_1, _("\ | |
4037 | Set permission to write into registers."), _("\ | |
4038 | Show permission to write into registers."), _("\ | |
4039 | When this permission is on, GDB may write into the target's registers.\n\ | |
4040 | Otherwise, any sort of write attempt will result in an error."), | |
4041 | set_target_permissions, NULL, | |
4042 | &setlist, &showlist); | |
4043 | ||
4044 | add_setshow_boolean_cmd ("may-write-memory", class_support, | |
4045 | &may_write_memory_1, _("\ | |
4046 | Set permission to write into target memory."), _("\ | |
4047 | Show permission to write into target memory."), _("\ | |
4048 | When this permission is on, GDB may write into the target's memory.\n\ | |
4049 | Otherwise, any sort of write attempt will result in an error."), | |
4050 | set_write_memory_permission, NULL, | |
4051 | &setlist, &showlist); | |
4052 | ||
4053 | add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, | |
4054 | &may_insert_breakpoints_1, _("\ | |
4055 | Set permission to insert breakpoints in the target."), _("\ | |
4056 | Show permission to insert breakpoints in the target."), _("\ | |
4057 | When this permission is on, GDB may insert breakpoints in the program.\n\ | |
4058 | Otherwise, any sort of insertion attempt will result in an error."), | |
4059 | set_target_permissions, NULL, | |
4060 | &setlist, &showlist); | |
4061 | ||
4062 | add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, | |
4063 | &may_insert_tracepoints_1, _("\ | |
4064 | Set permission to insert tracepoints in the target."), _("\ | |
4065 | Show permission to insert tracepoints in the target."), _("\ | |
4066 | When this permission is on, GDB may insert tracepoints in the program.\n\ | |
4067 | Otherwise, any sort of insertion attempt will result in an error."), | |
4068 | set_target_permissions, NULL, | |
4069 | &setlist, &showlist); | |
4070 | ||
4071 | add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, | |
4072 | &may_insert_fast_tracepoints_1, _("\ | |
4073 | Set permission to insert fast tracepoints in the target."), _("\ | |
4074 | Show permission to insert fast tracepoints in the target."), _("\ | |
4075 | When this permission is on, GDB may insert fast tracepoints.\n\ | |
4076 | Otherwise, any sort of insertion attempt will result in an error."), | |
4077 | set_target_permissions, NULL, | |
4078 | &setlist, &showlist); | |
4079 | ||
4080 | add_setshow_boolean_cmd ("may-interrupt", class_support, | |
4081 | &may_stop_1, _("\ | |
4082 | Set permission to interrupt or signal the target."), _("\ | |
4083 | Show permission to interrupt or signal the target."), _("\ | |
4084 | When this permission is on, GDB may interrupt/stop the target's execution.\n\ | |
4085 | Otherwise, any attempt to interrupt or stop will be ignored."), | |
4086 | set_target_permissions, NULL, | |
4087 | &setlist, &showlist); | |
6a3cb8e8 | 4088 | |
78cbbba8 LM |
4089 | add_com ("flash-erase", no_class, flash_erase_command, |
4090 | _("Erase all flash memory regions.")); | |
4091 | ||
6a3cb8e8 PA |
4092 | add_setshow_boolean_cmd ("auto-connect-native-target", class_support, |
4093 | &auto_connect_native_target, _("\ | |
4094 | Set whether GDB may automatically connect to the native target."), _("\ | |
4095 | Show whether GDB may automatically connect to the native target."), _("\ | |
4096 | When on, and GDB is not connected to a target yet, GDB\n\ | |
4097 | attempts \"run\" and other commands with the native target."), | |
4098 | NULL, show_auto_connect_native_target, | |
4099 | &setlist, &showlist); | |
c906108c | 4100 | } |